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Summary of Significant Accounting Policies - Warranty Program (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2017
Accounting Policies [Abstract] |  |
Warranty term (in years) | 1 year |
Sales credit reserve term (in years) | 1 year |
Sales and warranty reserves | $ 52 | $ 149

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- Definition Sales And Product Warranty Accrual, Current + References No definition available. + Details
Name: | sibn_SalesAndProductWarrantyAccrualCurrent
Namespace Prefix: | sibn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Sales Credit Reserve Period + References No definition available. + Details
Name: | sibn_SalesCreditReservePeriod
Namespace Prefix: | sibn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Standard Product Warranty Term + References No definition available. + Details
Name: | sibn_StandardProductWarrantyTerm
Namespace Prefix: | sibn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration