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Related Parties (Details 2) (THCAP [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
THCAP [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Retainer fee | $ 28 bosc_RelatedPartyTransactionRetainerFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember | $ 44 bosc_RelatedPartyTransactionRetainerFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember | $ 2 bosc_RelatedPartyTransactionRetainerFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember
Directors fee | 8 us-gaap_NoninterestExpenseDirectorsFees / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember | 7 us-gaap_NoninterestExpenseDirectorsFees / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember | 11 us-gaap_NoninterestExpenseDirectorsFees / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember
Stock warrants compensation expenses |  |  | 6 bosc_RelatedPartyTransactionStockWarrantsCompensationExpenses / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember
Total | $ 36 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember | $ 51 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember | $ 19 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bosc_ThcapMember

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- Definition Related party transaction Retainer fee. + References No definition available. + Details
Name: | bosc_RelatedPartyTransactionRetainerFee
Namespace Prefix: | bosc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Related party transaction Stock warrants compensation expenses. + References No definition available. + Details
Name: | bosc_RelatedPartyTransactionStockWarrantsCompensationExpenses
Namespace Prefix: | bosc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_NoninterestExpenseDirectorsFees
Namespace Prefix: | us-gaap_
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://www.xbrl.org/2003/role/presentationRef -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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- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration