<?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-20201102.xsd" xlink:type="simple"/>
    <context id="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001459839</identifier>
        </entity>
        <period>
            <startDate>2020-11-02</startDate>
            <endDate>2020-11-02</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV80L2ZyYWc6YzY5NWI5NGEwNWJhNGJjNDk5ODVlZmMzYzQ3MmM5YjIvdGFibGU6NWJhNTk0NDY5ZGEyNGQ3OWE3NGIwNjYzODk0YjlkM2UvdGFibGVyYW5nZTo1YmE1OTQ0NjlkYTI0ZDc5YTc0YjA2NjM4OTRiOWQzZV8yLTEtMS0xLTA_c86f3642-f5bf-4e7b-989d-70235ff6f505">0001459839</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV80L2ZyYWc6YzY5NWI5NGEwNWJhNGJjNDk5ODVlZmMzYzQ3MmM5YjIvdGFibGU6NWJhNTk0NDY5ZGEyNGQ3OWE3NGIwNjYzODk0YjlkM2UvdGFibGVyYW5nZTo1YmE1OTQ0NjlkYTI0ZDc5YTc0YjA2NjM4OTRiOWQzZV8zLTEtMS0xLTA_58398d4c-20ea-4190-b103-108b45354364">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjIy_8d64a4a0-33de-40ab-985b-9992d94ba023">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8zNzk_610945d4-e790-4c23-b910-b45060efbc50">2020-11-02</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjI4_ed70abd6-ebc0-4cb8-9a0d-165ceb896591">SI-BONE,&#160;INC.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6OGE2N2JjYWY3NDVkNDU5ZWFkODlmMzBlNjZjMGRiN2IvdGFibGVyYW5nZTo4YTY3YmNhZjc0NWQ0NTllYWQ4OWYzMGU2NmMwZGI3Yl8wLTAtMS0xLTA_889c62cf-f5c8-4818-86d1-184fbee72763">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6OGE2N2JjYWY3NDVkNDU5ZWFkODlmMzBlNjZjMGRiN2IvdGFibGVyYW5nZTo4YTY3YmNhZjc0NWQ0NTllYWQ4OWYzMGU2NmMwZGI3Yl8wLTItMS0xLTA_7ef34354-f341-437f-bd78-b178ee946668">001-38701</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6OGE2N2JjYWY3NDVkNDU5ZWFkODlmMzBlNjZjMGRiN2IvdGFibGVyYW5nZTo4YTY3YmNhZjc0NWQ0NTllYWQ4OWYzMGU2NmMwZGI3Yl8wLTQtMS0xLTA_c44b0904-12c1-478f-b4db-031e6818496a">26-2216351</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjIz_92c24349-c1da-4b15-a1fe-759131f40032">471 El Camino Real</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjI0_c76901bc-a5e5-4cb5-973d-9dd3b18692d0">Suite&#160;101</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjI5_e177531f-edd9-45a6-b9bc-421787a2274c">Santa Clara</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjMw_bddfc06a-aef4-4c5a-8600-f1eced36f378">CA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjMx_3cfd93d4-d91b-4835-94dd-1986575e7e67">95050</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjI1_792a3580-e47a-4aa9-b54e-e1a5b11df506">408</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjMy_8987877e-38c9-4bbd-8419-e1f5b694e4fe">207-0700</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6NWNkMDMwYTFiNjZlNDBjZWIzMzRjZmU1MTEzMTY4NDMvdGFibGVyYW5nZTo1Y2QwMzBhMWI2NmU0MGNlYjMzNGNmZTUxMTMxNjg0M18wLTAtMS0xLTA_c132f818-f801-4ed4-b85f-053c9d39cb3b">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6ZTFlMmVjOWMyMjAzNDE2Njg1NzcwYWRkZmM4MmZkOWEvdGFibGVyYW5nZTplMWUyZWM5YzIyMDM0MTY2ODU3NzBhZGRmYzgyZmQ5YV8wLTAtMS0xLTA_8a0647c3-e347-484b-8af7-681158decb31">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6MzA0MGFhZjEyMjY5NGMxNDk3YWFjYzliNzlmODY1YzgvdGFibGVyYW5nZTozMDQwYWFmMTIyNjk0YzE0OTdhYWNjOWI3OWY4NjVjOF8wLTAtMS0xLTA_dc437fc4-9101-4bec-b855-a4270b511314">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6ZGQxZTRhZmYyZDAzNDEwZTk0MmY3OWJjNWFiOTZiODQvdGFibGVyYW5nZTpkZDFlNGFmZjJkMDM0MTBlOTQyZjc5YmM1YWI5NmI4NF8wLTAtMS0xLTA_96f3da43-0b07-42c7-8938-894faeea6e74">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6ZDY0MDVhNzM5YWJmNDhlM2FiZDBjZmNkZGYzZGY4ZmYvdGFibGVyYW5nZTpkNjQwNWE3MzlhYmY0OGUzYWJkMGNmY2RkZjNkZjhmZl8xLTAtMS0xLTA_6ee6c051-ab6e-4637-8276-1d991cd337c5">Common Stock, par value $0.0001&#160;per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6ZDY0MDVhNzM5YWJmNDhlM2FiZDBjZmNkZGYzZGY4ZmYvdGFibGVyYW5nZTpkNjQwNWE3MzlhYmY0OGUzYWJkMGNmY2RkZjNkZjhmZl8xLTEtMS0xLTA_be41a0f7-e01b-4cb3-915e-d716e4ee64c4">SIBN</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGFibGU6ZDY0MDVhNzM5YWJmNDhlM2FiZDBjZmNkZGYzZGY4ZmYvdGFibGVyYW5nZTpkNjQwNWE3MzlhYmY0OGUzYWJkMGNmY2RkZjNkZjhmZl8xLTItMS0xLTA_510a407d-a56a-4696-9c82-947ccdf6157d">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjMz_585ad5d5-ca4b-49a8-a3e5-407dbcf53d97">true</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod
      contextRef="i72f2ec0fccbd48249535e4bb4ec1619b_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmNlYzM2NmI4ODQ4ODhiYjZkNjE2YWE0MDk2N2Q1L3NlYzowMzZjZWMzNjZiODg0ODg4YmI2ZDYxNmFhNDA5NjdkNV8xL2ZyYWc6ZjU2YzUzZWU3N2E0NDRhMDhlZDhlOGQ3OGVjNmM5ODUvdGV4dHJlZ2lvbjpmNTZjNTNlZTc3YTQ0NGEwOGVkOGU4ZDc4ZWM2Yzk4NV8xNjI3_c11feeca-4530-4399-8511-bb083dd348db">false</dei:EntityExTransitionPeriod>
</xbrl>
