<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2020-01-31"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="sibn-20210802.xsd" xlink:type="simple"/>
    <context id="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001459839</identifier>
        </entity>
        <period>
            <startDate>2021-08-02</startDate>
            <endDate>2021-08-02</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml80L2ZyYWc6NTQ4YjhjZjczMDU1NDE3MDgzMmIxMTU1YmU3ZmQyNmYvdGFibGU6OTk3ZjllMzRkYjIxNDY4NzlkMDFmMjBlNDA5Y2YyMmEvdGFibGVyYW5nZTo5OTdmOWUzNGRiMjE0Njg3OWQwMWYyMGU0MDljZjIyYV8yLTEtMS0xLTA_218251f2-9d74-4030-b715-71e3b1ee2fe3">0001459839</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml80L2ZyYWc6NTQ4YjhjZjczMDU1NDE3MDgzMmIxMTU1YmU3ZmQyNmYvdGFibGU6OTk3ZjllMzRkYjIxNDY4NzlkMDFmMjBlNDA5Y2YyMmEvdGFibGVyYW5nZTo5OTdmOWUzNGRiMjE0Njg3OWQwMWYyMGU0MDljZjIyYV8zLTEtMS0xLTA_5ff47ddf-748b-4f57-bc6f-8f8bad21ce81">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjIy_a3d7fbe3-041e-4276-b9d1-c4944caea9fc">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8zNzk_d084fafc-9fcd-48c8-ac2c-925d98b670ff">2021-08-02</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjI3_cf36e7b9-5e76-47b0-90e1-90d3eec418ef">SI-BONE,&#160;INC.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6MDliNjk0YWY0Y2ZiNGI0OWE4MjQwZGU2MTIxYjU4OGIvdGFibGVyYW5nZTowOWI2OTRhZjRjZmI0YjQ5YTgyNDBkZTYxMjFiNTg4Yl8wLTAtMS0xLTA_7a7e28fd-dc7c-4c03-97a3-f33e4f932f77">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6MDliNjk0YWY0Y2ZiNGI0OWE4MjQwZGU2MTIxYjU4OGIvdGFibGVyYW5nZTowOWI2OTRhZjRjZmI0YjQ5YTgyNDBkZTYxMjFiNTg4Yl8wLTItMS0xLTA_996363dc-d251-4bd9-9fbe-6762fe049a03">001-38701</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6MDliNjk0YWY0Y2ZiNGI0OWE4MjQwZGU2MTIxYjU4OGIvdGFibGVyYW5nZTowOWI2OTRhZjRjZmI0YjQ5YTgyNDBkZTYxMjFiNTg4Yl8wLTQtMS0xLTA_1cce1783-7a33-4283-97e5-242bf5fa2ec4">26-2216351</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjIz_dafda019-38c2-4eb4-b667-b3aa293a72b1">471 El Camino Real</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjI4_aa3ee352-3644-4bb4-aff8-e814fbdcfbc9">Suite&#160;101</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjI5_f0767d55-2b64-4f2d-835f-5d3b70d2ad38">Santa Clara</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjMw_c6a74e95-768e-4822-bb32-3b5f92c1dc21">CA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjI0_25b65a3c-fc6b-4b46-8205-2893ad9f4fc7">95050</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjMx_17f86713-caeb-4e64-b9b2-2022a696ffac">408</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjI1_f777ae27-c231-4900-b1eb-c65b6f98b2bb">207-0700</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6MTkxOTc2Yzg3MDgwNDY4ZjllNmNlMDgyZmI3NGQ3OGEvdGFibGVyYW5nZToxOTE5NzZjODcwODA0NjhmOWU2Y2UwODJmYjc0ZDc4YV8wLTAtMS0xLTA_b406675e-3abb-4d6b-b643-16cc60cda677">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6ZDY0NDQ4NmFiN2IzNGZhZmE3ZmY1ZDJlODRkOTMyZGEvdGFibGVyYW5nZTpkNjQ0NDg2YWI3YjM0ZmFmYTdmZjVkMmU4NGQ5MzJkYV8wLTAtMS0xLTA_3ee131ea-7318-47e5-b082-ae429cecd4ab">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6OGYwYTcwYTI0MWUzNGRiZDk0ZDg0YTU2MGIxZjNkN2YvdGFibGVyYW5nZTo4ZjBhNzBhMjQxZTM0ZGJkOTRkODRhNTYwYjFmM2Q3Zl8wLTAtMS0xLTA_0c814d73-30f8-4fe3-b07b-5508fb004534">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6NGVjOWYyZWI4YmNjNDE3NWJiNjBhNjYwZThkZjc2ZjEvdGFibGVyYW5nZTo0ZWM5ZjJlYjhiY2M0MTc1YmI2MGE2NjBlOGRmNzZmMV8wLTAtMS0xLTA_fffbc158-cbf3-41e0-8c98-069de4fe26ea">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6ODYxZGI0ZmIwNTA5NDQwNTgxNTUzNTc3MTRjNmI3ZjcvdGFibGVyYW5nZTo4NjFkYjRmYjA1MDk0NDA1ODE1NTM1NzcxNGM2YjdmN18xLTAtMS0xLTA_24f0a729-5d78-452b-91d5-30252b9c9709">Common Stock, par value $0.0001&#160;per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6ODYxZGI0ZmIwNTA5NDQwNTgxNTUzNTc3MTRjNmI3ZjcvdGFibGVyYW5nZTo4NjFkYjRmYjA1MDk0NDA1ODE1NTM1NzcxNGM2YjdmN18xLTEtMS0xLTA_8c28315b-030a-49e9-b569-8fdbb27506c6">SIBN</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGFibGU6ODYxZGI0ZmIwNTA5NDQwNTgxNTUzNTc3MTRjNmI3ZjcvdGFibGVyYW5nZTo4NjFkYjRmYjA1MDk0NDA1ODE1NTM1NzcxNGM2YjdmN18xLTItMS0xLTA_f6b276b7-03a3-4390-8736-b96df0ca36c2">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjMz_1d5643d9-1854-4dba-8a94-cd10269366e0">true</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod
      contextRef="i6b8009f911654cb78aacfe049dfb605d_D20210802-20210802"
      id="id3VybDovL2RvY3MudjEvZG9jOmQ5YWRiMzQ5ZDRiOTQzY2Q5MWQxMTRiZWUxZDkwMDgyL3NlYzpkOWFkYjM0OWQ0Yjk0M2NkOTFkMTE0YmVlMWQ5MDA4Ml8xL2ZyYWc6ZjAwZjg4MjExMmEwNGNiNjg4NWM3ZGU0M2NlN2QwYzYvdGV4dHJlZ2lvbjpmMDBmODgyMTEyYTA0Y2I2ODg1YzdkZTQzY2U3ZDBjNl8xNjI2_be7edcd3-1855-4440-a9c4-2bfec4c2f131">false</dei:EntityExTransitionPeriod>
</xbrl>
