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    <link:label id="lab_dei_EntityIncorporationStateCountryCode_b8af7f84-7921-4065-a479-b432c78dfa92_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
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    <link:label id="lab_sibn_OptionsTrancheFourMember_99798c5f-d2c8-413e-a7f8-80f5206f346e_terseLabel_en-US" xlink:label="lab_sibn_OptionsTrancheFourMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">$5.32-$20.51</link:label>
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    <link:label id="lab_us-gaap_RetirementPlanNameAxis_bd7b2df2-d898-4eb0-a012-88d1f0b44ed7_terseLabel_en-US" xlink:label="lab_us-gaap_RetirementPlanNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Name [Axis]</link:label>
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    <link:label id="lab_srt_AffiliatedEntityMember_8a41238f-d470-4052-8219-1e6310327655_terseLabel_en-US" xlink:label="lab_srt_AffiliatedEntityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SeaSpine</link:label>
    <link:label id="lab_srt_AffiliatedEntityMember_label_en-US" xlink:label="lab_srt_AffiliatedEntityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Affiliated Entity [Member]</link:label>
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    <link:label id="lab_sibn_SecondFollowOnPublicOfferingMember_90a9b9f5-08b9-4d98-b034-3d570c886ce7_terseLabel_en-US" xlink:label="lab_sibn_SecondFollowOnPublicOfferingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Second follow-on public offering</link:label>
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    <link:label id="lab_us-gaap_GrossProfit_a34531b3-e44e-45ca-98c2-97624c6c0d94_totalLabel_en-US" xlink:label="lab_us-gaap_GrossProfit" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross profit</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_b898beb0-c926-4e40-8da5-051f57e03f7a_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lessee, Operating Lease, Liability, to be Paid, Year Two</link:label>
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    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_19ef77ed-ce2c-40a1-a978-b486e57afd1d_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance Sheet Location [Domain]</link:label>
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    <link:label id="lab_sibn_A2018EquityIncentivePlanMember_22d016be-8d78-42c0-a081-1ff32aac52b6_terseLabel_en-US" xlink:label="lab_sibn_A2018EquityIncentivePlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2018 Equity Incentive Plan</link:label>
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    <link:label id="lab_us-gaap_ClassOfWarrantOrRightLineItems_07af0f34-7eca-4ad6-a6b6-8609ae1132b3_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right [Line Items]</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_2bec227b-5084-4897-9439-63fa13b0ad13_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Options canceled and forfeited (in dollars per share)</link:label>
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    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_88f68f91-b274-4f42-8154-d180bea5113b_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Less: Unamortized debt issuance costs</link:label>
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    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_8a90357b-bca1-415b-9617-94a6c60e32f4_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other comprehensive income (loss):</link:label>
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    <link:label id="lab_us-gaap_PreferredStockSharesAuthorized_1eedacd0-74dd-4a09-9ce1-c9b8186cfcae_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred stock authorized (in shares)</link:label>
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    <link:label id="lab_us-gaap_UnrecognizedTaxBenefits_e94a8eb6-1c04-4a79-9a07-105994656e47_periodStartLabel_en-US" xlink:label="lab_us-gaap_UnrecognizedTaxBenefits" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at beginning of the year</link:label>
    <link:label id="lab_us-gaap_UnrecognizedTaxBenefits_76db06a0-d0e9-448f-9232-fd516881d343_periodEndLabel_en-US" xlink:label="lab_us-gaap_UnrecognizedTaxBenefits" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at end of the year</link:label>
    <link:label id="lab_us-gaap_UnrecognizedTaxBenefits_label_en-US" xlink:label="lab_us-gaap_UnrecognizedTaxBenefits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognized Tax Benefits</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxAuthorityDomain_1bdaf102-ea8c-45e2-a37f-b5e5bedcdd7f_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Authority [Domain]</link:label>
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    <link:label id="lab_sibn_ConstructionInProgressSantaClaraLeaseMember_9be6f5f7-f316-4d8b-9595-e0acfe7d8283_terseLabel_en-US" xlink:label="lab_sibn_ConstructionInProgressSantaClaraLeaseMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Construction in Progress, Santa Clara Lease</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_8346a51f-d3d4-45aa-ad23-466e5a408aab_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CURRENT LIABILITIES</link:label>
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    <link:label id="lab_us-gaap_ClassOfWarrantOrRightTable_label_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right [Table]</link:label>
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    <link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_3922b091-c84d-4d8a-95d5-5c5b9d61140f_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2025</link:label>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_0ecc5d58-b665-4a6c-a9e4-ecaafdd401b8_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of common stock from public offerings, net of underwriting discounts, commissions and offering costs</link:label>
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    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_03a73c39-e74d-401e-932b-66ac334a8e93_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and administrative</link:label>
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    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_a256d6fb-d89e-48cf-83a5-8ede0b3a32fb_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings</link:label>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_78eba1f3-5357-4b0a-b62c-1427a1e52728_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of common stock from public offerings, net of underwriting discounts, commissions and offering costs (in shares)</link:label>
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    <link:label id="lab_sibn_AuditInformationAbstract_documentation_en-US" xlink:label="lab_sibn_AuditInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Audit Information</link:label>
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    <link:label id="lab_us-gaap_AccruedProfessionalFeesCurrent_1fcdc6ab-a8db-4114-af95-af01bc52bc12_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedProfessionalFeesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued professional services</link:label>
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    <link:label id="lab_us-gaap_OperatingLeaseLiability_db87cabc-340b-4632-8e20-58fe22c1f1b2_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total operating lease liabilities</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiability" xlink:to="lab_us-gaap_OperatingLeaseLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentTransitionReport_08680a25-6dfb-4597-beda-79a59638eb0c_terseLabel_en-US" xlink:label="lab_dei_DocumentTransitionReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Transition Report</link:label>
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    <link:label id="lab_us-gaap_CommonStockValue_a4331019-43f4-4534-a138-2571ca841b1f_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock, $0.0001 par value; 100,000,000 shares authorized; 33,674,085 and 32,583,220 shares issued and outstanding, respectively</link:label>
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    <link:label id="lab_sibn_Company401KPlanMember_c79b8d0c-5b5b-4e5f-82ca-a7afc2e331d2_terseLabel_en-US" xlink:label="lab_sibn_Company401KPlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">401(k) Plan</link:label>
    <link:label id="lab_sibn_Company401KPlanMember_label_en-US" xlink:label="lab_sibn_Company401KPlanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Company 401K Plan [Member]</link:label>
    <link:label id="lab_sibn_Company401KPlanMember_documentation_en-US" xlink:label="lab_sibn_Company401KPlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Company 401K Plan [Member]</link:label>
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    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_19d6f132-76e3-4b5d-a6b6-d33024778f7c_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognized compensation cost, expected period for recognition (in years)</link:label>
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    <link:label id="lab_srt_MaximumMember_d14efc6a-3db0-47e8-b66c-2a0c75659270_terseLabel_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum</link:label>
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    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_bbfe4275-884a-4349-a604-7644d714bfd4_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effective Income Tax Rate Reconciliation</link:label>
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    <link:label id="lab_us-gaap_OperatingLeasesRentExpenseNet_e861c398-5357-46b3-853b-d0e9745bf68b_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesRentExpenseNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rent expense</link:label>
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    <link:label id="lab_us-gaap_Liabilities_e4ce4556-c386-4749-8086-b10bcfaaab7a_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TOTAL LIABILITIES</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Liabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities" xlink:to="lab_us-gaap_Liabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_sibn_FollowOnPublicOfferingAndSecondaryOfferingMember_ebe55c23-3ea0-4fb4-8050-ee2c3e95e268_terseLabel_en-US" xlink:label="lab_sibn_FollowOnPublicOfferingAndSecondaryOfferingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">First follow-on public offering and secondary offering</link:label>
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    <link:label id="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_2dd9eae4-e71a-4610-b61c-5d52b064d56e_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments of prepayment penalty and lender fees</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment for Debt Extinguishment or Debt Prepayment Cost</link:label>
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    <link:label id="lab_sibn_WarrantsIssuedNovemberTwentySixthTwentyFourteenMember_65190a6d-bcaa-4422-a502-5863b2149438_terseLabel_en-US" xlink:label="lab_sibn_WarrantsIssuedNovemberTwentySixthTwentyFourteenMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warrants Issued 11/26/2014</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_d0983f0b-c936-4fc7-90c5-4a6c7030db17_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Accrued Liabilities and Other</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1619d311-378f-46ec-b776-ab9c2a56ec52_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from financing activities</link:label>
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    <link:label id="lab_dei_EntityAddressCityOrTown_10bfb6f9-0f96-467d-9cc2-c6ab5741fb7e_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_08a201ab-3fbb-467e-b2a0-9772cb8c41be_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Estimated useful life</link:label>
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    <link:label id="lab_us-gaap_OtherEmployeeRelatedLiabilitiesCurrent_b92332cc-7ffe-495a-89ba-9e1aa0a89253_terseLabel_en-US" xlink:label="lab_us-gaap_OtherEmployeeRelatedLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued compensation and related expenses for employee payroll deductions</link:label>
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    <link:label id="lab_us-gaap_DeferredIncomeTaxLiabilities_7c091d35-3168-431b-b790-13e38bf5cb8b_negatedTotalLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxLiabilities" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total deferred tax liabilities</link:label>
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    <link:label id="lab_sibn_DevelopmentAgreementMember_74eb03ec-7bd9-4867-a3b6-36ea8e661f39_terseLabel_en-US" xlink:label="lab_sibn_DevelopmentAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Joint development agreement</link:label>
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    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_8a48ffa3-c539-4ae1-9b6e-b3a518a5c01d_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts receivable, net of allowance for credit losses of $264 and $263, respectively</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_283b1175-c092-403e-9aa7-24e6590afffe_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment, Type [Axis]</link:label>
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    <link:label id="lab_us-gaap_DeferredTaxAssetsValuationAllowance_bdba1163-611f-4c38-887f-d64afc9a5ae8_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsValuationAllowance" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Less: Valuation allowance</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
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    <link:label id="lab_us-gaap_SubsidiarySaleOfStockLineItems_6a8d2d70-2164-4a36-befc-6c130988a8d8_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary, Sale of Stock [Line Items]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsidiarySaleOfStockLineItems"/>
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    <link:label id="lab_dei_AuditorLocation_c6920649-b3c6-432d-9c7c-ab9dc2d3c701_terseLabel_en-US" xlink:label="lab_dei_AuditorLocation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditor Location</link:label>
    <link:label id="lab_dei_AuditorLocation_label_en-US" xlink:label="lab_dei_AuditorLocation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditor Location</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorLocation" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AuditorLocation"/>
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    <link:label id="lab_sibn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceAsPercentOfFairMarketValueForIndividualOwningMoreThanTenPercentOfOutstandingShares_4f4ef01b-04eb-49de-bf0d-0fa315948a75_terseLabel_en-US" xlink:label="lab_sibn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceAsPercentOfFairMarketValueForIndividualOwningMoreThanTenPercentOfOutstandingShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price of option as percent of fair market value when individual owns more than 10% of shares outstanding (percent)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_sibn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceAsPercentOfFairMarketValueForIndividualOwningMoreThanTenPercentOfOutstandingShares" xlink:href="sibn-20211231.xsd#sibn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceAsPercentOfFairMarketValueForIndividualOwningMoreThanTenPercentOfOutstandingShares"/>
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    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_365bbf0b-1233-439d-864d-c8e4b0756907_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2021</link:label>
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    <link:label id="lab_sibn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOfferingPeriodInterval_6758f339-02dc-45d3-a4f0-8bbe0d2844d9_terseLabel_en-US" xlink:label="lab_sibn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOfferingPeriodInterval" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employees stock purchase program offering period interval (in months)</link:label>
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    <link:label id="lab_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_609134e8-48bb-4549-b62f-7587d4d5c401_terseLabel_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Benefit Plan</link:label>
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    <link:label id="lab_us-gaap_UseOfEstimates_97fb4ec2-bc0e-44e1-9956-23e33eb19ee5_terseLabel_en-US" xlink:label="lab_us-gaap_UseOfEstimates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Use of Estimates</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_3df3f747-3ec2-425b-acf6-12c1b1bfe20c_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Basic and Diluted Net Loss per Share</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_8c7494da-1192-4cd6-b9a1-ccaf97d06277_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from follow-on public offering, net of underwriting discounts, commissions and offering costs</link:label>
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    <link:label id="lab_us-gaap_StateAndLocalJurisdictionMember_4fb7b349-21c8-4050-9c14-1588d0ba14c0_terseLabel_en-US" xlink:label="lab_us-gaap_StateAndLocalJurisdictionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">State</link:label>
    <link:label id="lab_us-gaap_StateAndLocalJurisdictionMember_label_en-US" xlink:label="lab_us-gaap_StateAndLocalJurisdictionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">State and Local Jurisdiction [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember"/>
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    <link:label id="lab_us-gaap_SaleOfStockPricePerShare_45a3b0b1-9325-4084-be38-decb892653bd_verboseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockPricePerShare" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Public offering price (in dollars per share)</link:label>
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    <link:label id="lab_sibn_OptionsTrancheTwoMember_cb208435-2630-4885-af03-5ba6d694cd39_terseLabel_en-US" xlink:label="lab_sibn_OptionsTrancheTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">$3.70-$4.41</link:label>
    <link:label id="lab_sibn_OptionsTrancheTwoMember_label_en-US" xlink:label="lab_sibn_OptionsTrancheTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Options Tranche Two [Member]</link:label>
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    <link:label id="lab_sibn_AvailableForSaleDebtSecuritiesCurrentAccumulatedGrossUnrealizedGainBeforeTax_807eaf02-44e3-41d9-a46c-b6eb493f47ff_terseLabel_en-US" xlink:label="lab_sibn_AvailableForSaleDebtSecuritiesCurrentAccumulatedGrossUnrealizedGainBeforeTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealized Gains</link:label>
    <link:label id="lab_sibn_AvailableForSaleDebtSecuritiesCurrentAccumulatedGrossUnrealizedGainBeforeTax_label_en-US" xlink:label="lab_sibn_AvailableForSaleDebtSecuritiesCurrentAccumulatedGrossUnrealizedGainBeforeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Available For Sale Debt Securities, Current, Accumulated Gross Unrealized Gain Before Tax</link:label>
    <link:label id="lab_sibn_AvailableForSaleDebtSecuritiesCurrentAccumulatedGrossUnrealizedGainBeforeTax_documentation_en-US" xlink:label="lab_sibn_AvailableForSaleDebtSecuritiesCurrentAccumulatedGrossUnrealizedGainBeforeTax" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Available For Sale Debt Securities, Current, Accumulated Gross Unrealized Gain Before Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sibn_AvailableForSaleDebtSecuritiesCurrentAccumulatedGrossUnrealizedGainBeforeTax" xlink:href="sibn-20211231.xsd#sibn_AvailableForSaleDebtSecuritiesCurrentAccumulatedGrossUnrealizedGainBeforeTax"/>
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    <link:label id="lab_us-gaap_NonUsMember_551d8b21-c0f0-4836-9b6d-8d241417b75f_terseLabel_en-US" xlink:label="lab_us-gaap_NonUsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">International</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonUsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NonUsMember" xlink:to="lab_us-gaap_NonUsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_1fca1d09-97b5-4f77-bedc-d5f409026a08_totalLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive loss</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
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    <link:label id="lab_sibn_DebtInstrumentPrepaymentPremiumYearOnePercentage_a538fa2e-50bc-4341-8ac7-731accb34b8c_terseLabel_en-US" xlink:label="lab_sibn_DebtInstrumentPrepaymentPremiumYearOnePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Prepayment premium in year one (percent)</link:label>
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    <link:label id="lab_sibn_DebtInstrumentPrepaymentPremiumYearOnePercentage_documentation_en-US" xlink:label="lab_sibn_DebtInstrumentPrepaymentPremiumYearOnePercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument Prepayment Premium Year One Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sibn_DebtInstrumentPrepaymentPremiumYearOnePercentage" xlink:href="sibn-20211231.xsd#sibn_DebtInstrumentPrepaymentPremiumYearOnePercentage"/>
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    <link:label id="lab_sibn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsEarlyExerciseCommonStockSubjectToRepurchase_b176865c-148d-4a2f-8bda-ae9bca0d9aa2_terseLabel_en-US" xlink:label="lab_sibn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsEarlyExerciseCommonStockSubjectToRepurchase" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Early exercise of stock options, share subject to repurchase (in shares)</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_40ca98fd-1e66-493e-a557-780b3ebd9836_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash (used in) provided by financing activities</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_872b04bb-2219-419a-a62e-a90e14a48d9f_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party Transaction [Line Items]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems" xlink:to="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:type="arc" order="1"/>
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    <link:label id="lab_sibn_MarketableSecuritiesAmortizedCost_documentation_en-US" xlink:label="lab_sibn_MarketableSecuritiesAmortizedCost" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total amortized cost for marketable securities included in cash equivalents and investments.</link:label>
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    <link:label id="lab_us-gaap_OtherNoncurrentLiabilitiesMember_a544ed12-a534-4b8b-88cc-a546290a53f3_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNoncurrentLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other long-term liabilities</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNoncurrentLiabilitiesMember" xlink:to="lab_us-gaap_OtherNoncurrentLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredTaxAssetsNetOfValuationAllowanceAbstract_23bb28d2-b600-43c6-848c-62f637199db2_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNetOfValuationAllowanceAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Assets</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsNetOfValuationAllowanceAbstract_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNetOfValuationAllowanceAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Assets, Net of Valuation Allowance [Abstract]</link:label>
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    <link:label id="lab_us-gaap_CorporateDebtSecuritiesMember_d6e8f436-a542-4784-9f93-98ae24561f7c_terseLabel_en-US" xlink:label="lab_us-gaap_CorporateDebtSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporate bonds</link:label>
    <link:label id="lab_us-gaap_CorporateDebtSecuritiesMember_label_en-US" xlink:label="lab_us-gaap_CorporateDebtSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporate Debt Securities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
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    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_b62267db-4c1b-4e04-9218-a440bb782eeb_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Effective Income Tax Rate Reconciliation</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]</link:label>
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    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_2b75d649-5207-467a-a6a8-4b174ca1d78f_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Measurement</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Disclosures [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock"/>
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    <link:label id="lab_sibn_ProceedsFromSaleOfMarketableSecurities_2e43e436-d217-4a9f-9a72-93e521367f5c_terseLabel_en-US" xlink:label="lab_sibn_ProceedsFromSaleOfMarketableSecurities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sales of marketable securities</link:label>
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    <link:label id="lab_sibn_ProceedsFromSaleOfMarketableSecurities_documentation_en-US" xlink:label="lab_sibn_ProceedsFromSaleOfMarketableSecurities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds From Sale Of Marketable Securities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sibn_ProceedsFromSaleOfMarketableSecurities" xlink:href="sibn-20211231.xsd#sibn_ProceedsFromSaleOfMarketableSecurities"/>
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    <link:label id="lab_us-gaap_AccountsPayableCurrent_203540c1-ffcf-4ba2-876b-68829de01296_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts payable</link:label>
    <link:label id="lab_us-gaap_AccountsPayableCurrent_label_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Payable, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsPayableCurrent" xlink:to="lab_us-gaap_AccountsPayableCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock_4b3fcd68-0e18-483e-9908-168a72dbe7fc_terseLabel_en-US" xlink:label="lab_sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warrants</link:label>
    <link:label id="lab_sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock_label_en-US" xlink:label="lab_sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warrants, Classified As Equity And Liabilities [Policy Text Block]</link:label>
    <link:label id="lab_sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock_documentation_en-US" xlink:label="lab_sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warrants, Classified As Equity And Liabilities [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock" xlink:href="sibn-20211231.xsd#sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock" xlink:to="lab_sibn_WarrantsClassifiedAsEquityAndLiabilitiesPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_35688462-0e67-4098-994b-88e265eef890_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment losses on long-lived assets</link:label>
    <link:label id="lab_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_label_en-US" xlink:label="lab_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment, Long-Lived Asset, Held-for-Use</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsHeldForUse"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:to="lab_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_183b5084-5c86-425a-9aa0-b3e4fd3ecc7d_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation and amortization</link:label>
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    <link:label id="lab_sibn_OptionsTrancheFiveMember_8be28b82-4410-4172-9005-465717a60374_terseLabel_en-US" xlink:label="lab_sibn_OptionsTrancheFiveMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">$20.52-$22.00</link:label>
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    <link:label id="lab_sibn_OptionsTrancheFiveMember_documentation_en-US" xlink:label="lab_sibn_OptionsTrancheFiveMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Options Tranche Five [Member]</link:label>
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    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_b8728789-8867-4d24-8740-53f0ad227376_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated Other Comprehensive Income</link:label>
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    <link:label id="lab_us-gaap_IncomeStatementLocationDomain_afd99e5b-07e5-4103-b3cd-0bc4d0966ab0_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location [Domain]</link:label>
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    <link:label id="lab_sibn_RelatedPartyTransactionTermOfAgreement_5223f102-b5ba-4e9a-8316-80728176f360_terseLabel_en-US" xlink:label="lab_sibn_RelatedPartyTransactionTermOfAgreement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term of product royalty sales period (in years)</link:label>
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    <link:label id="lab_us-gaap_InvestmentsFairValueDisclosure_784b078b-5114-4870-be25-8f46b41428e4_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Marketable securities</link:label>
    <link:label id="lab_us-gaap_InvestmentsFairValueDisclosure_label_en-US" xlink:label="lab_us-gaap_InvestmentsFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments, Fair Value Disclosure</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_849108fa-6551-4115-a54e-f6832ece205d_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase in number of shares reserved for future issuance (in shares)</link:label>
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    <link:label id="lab_sibn_MarketableSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_bb865128-6997-4034-a68f-aae8c0f56b9d_negatedTerseLabel_en-US" xlink:label="lab_sibn_MarketableSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total marketable securities, Unrealized Losses</link:label>
    <link:label id="lab_sibn_MarketableSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_label_en-US" xlink:label="lab_sibn_MarketableSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Marketable Securities, Accumulated Gross Unrealized Loss, Before Tax</link:label>
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    <link:label id="lab_sibn_DebtInstrumentPrepaymentPremiumYearThreeOrLaterPercentage_93993034-80b7-4204-a562-62ac3a558658_terseLabel_en-US" xlink:label="lab_sibn_DebtInstrumentPrepaymentPremiumYearThreeOrLaterPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Prepayment premium in year three or later (percent)</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_2b942869-bff7-4e5c-95e0-77a1ad9186d9_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property and equipment, net</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_f0c849fb-7870-4457-9262-616a7c2e90fa_totalLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property and equipment, net</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment, Net</link:label>
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    <link:label id="lab_us-gaap_OperatingExpenses_15b3b887-fc79-4611-9d3d-e918563d7d6f_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingExpenses" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total operating expenses</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingExpenses" xlink:to="lab_us-gaap_OperatingExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_a2a21ee4-dc53-49cf-b521-e5a79503737c_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other long-term liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liabilities, Noncurrent</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrent" xlink:to="lab_us-gaap_OtherLiabilitiesNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_sibn_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfOptionsToExtend_0b3f2fa6-db72-4ebb-8bc4-5581ab0c0f13_terseLabel_en-US" xlink:label="lab_sibn_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfOptionsToExtend" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease renewal, number of options to renew</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_2ec0ee04-11b1-4f1a-8d0a-b37a77d3d0b7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Outstanding Borrowings</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionDomain_782bcf8b-cb55-4033-84a3-41bfdbe32251_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party Transaction [Domain]</link:label>
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    <link:label id="lab_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_93bd3d47-8fa5-4360-b965-15a6dbccb7c1_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Price&#160;per Share (in dollars per share)</link:label>
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    <link:label id="lab_sibn_StockIssuedDuringPeriodSharesRestrictedStockUnits_d67eb864-9e84-45ae-8952-b1ebb4bf7439_terseLabel_en-US" xlink:label="lab_sibn_StockIssuedDuringPeriodSharesRestrictedStockUnits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of common stock upon vesting of restricted stock units (in shares)</link:label>
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    <link:label id="lab_us-gaap_ClassOfWarrantOrRightAxis_c8218509-9cb5-403c-9e6f-1ea8d4b4784f_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right [Axis]</link:label>
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    <link:label id="lab_us-gaap_CommonClassAMember_dac6b2c4-ff17-4f93-aa90-f8c3988dbe66_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonClassAMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock</link:label>
    <link:label id="lab_us-gaap_CommonClassAMember_label_en-US" xlink:label="lab_us-gaap_CommonClassAMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Class A [Member]</link:label>
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    <link:label id="lab_us-gaap_ConstructionInProgressMember_cd775d09-429d-4b92-919b-63970829a01f_terseLabel_en-US" xlink:label="lab_us-gaap_ConstructionInProgressMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Construction in progress</link:label>
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    <link:label id="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_178018ad-9cc3-4014-8659-8e26e1539260_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss on sale and disposal of property and equipment</link:label>
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    <link:label id="lab_sibn_NonqualifiedStockOptionMember_7bb8216e-ee46-4e6a-90b9-2a3efade2a2a_terseLabel_en-US" xlink:label="lab_sibn_NonqualifiedStockOptionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nonqualified Stock Options</link:label>
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    <link:label id="lab_country_US_55f3b97e-ec03-470d-8c4e-7a79ff18e073_terseLabel_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">United States</link:label>
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    <link:label id="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_7012e435-c2d2-44d1-9cee-2a6097cd1cf8_terseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares issued (in shares)</link:label>
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    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_90a9791b-002d-437a-91f5-1f553f06acd5_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock, par value (in dollars per share)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum"/>
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    <link:label id="lab_us-gaap_AssetsCurrentAbstract_117367b8-6edc-4394-a053-5a060868eed8_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CURRENT ASSETS</link:label>
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    <link:label id="lab_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_10c5e4f3-fa0d-450a-b79c-d442f24f8c87_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares reserved for issuance (in shares)</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_1a915231-642e-4ecb-b3a5-63631715d2be_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes</link:label>
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    <link:label id="lab_sibn_OptionsTrancheOneMember_8d422b05-be1d-4ee8-a1c3-5619f5350aab_terseLabel_en-US" xlink:label="lab_sibn_OptionsTrancheOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">$0.84-$3.69</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_cbefba43-70d2-44c0-b397-fe5ffb3e3b81_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash (used in) provided by investing activities</link:label>
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