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Related Parties (Details) - Related Party [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Related Party Transaction [Line Items] |  |  |
Monthly fees | $ 49 | $ 183 | $ 125
Bonus | 10 | 49 |
Payments for employees | 33 | 39 |
Total | $ 92 | $ 271 | $ 125

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- Definition The amount of bonus. + References No definition available. + Details
Name: | bosc_RelatedPartyBonus
Namespace Prefix: | bosc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Related party monthly fees. + References No definition available. + Details
Name: | bosc_RelatedPartyMonthlyFees
Namespace Prefix: | bosc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of payments for employees. + References No definition available. + Details
Name: | bosc_RelatedPartyPaymentsForEmployees
Namespace Prefix: | bosc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bosc_RelatedPartyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |