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Statements of Changes in Shareholders' Equity (USD $) In Thousands, except Share data | Total | Ordinary shares | Share capital and additional paid-in capital [Member] | Accumulated other comprehensive income (loss) [Member] | Accumulated deficit [Member]
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2011 | $ 3,598 us-gaap_StockholdersEquity |  | $ 74,158 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember | $ (243)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ (70,317)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance, shares at Dec. 31, 2011 |  | 1,116,981 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of Ordinary shares for options exercised, shares |  | 1,254 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Share-based compensation expense | 107 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation |  | 107 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember |  |
Share-based compensation expense, shares |  | 14,450 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Net loss | (549)us-gaap_NetIncomeLoss |  |  |  | (549)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance at Dec. 31, 2012 | 3,156 us-gaap_StockholdersEquity |  | 74,265 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember | (243)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (70,866)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance, shares at Dec. 31, 2012 |  | 1,132,685 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of Ordinary shares for options and warrants exercised | 95 bosc_IssuanceOfOrdinarySharesForOptionsAndWarrantsExercised |  | 95 bosc_IssuanceOfOrdinarySharesForOptionsAndWarrantsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember |  |
Issuance of Ordinary shares for options and warrants exercised, shares |  | 34,504 bosc_IssuanceOfOrdinarySharesForOptionsAndWarrantsExercisedShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of Ordinary shares related to SEDA, net of issuance costs (see note 12a2) | 241 us-gaap_StockIssuedDuringPeriodValueOther |  | 241 us-gaap_StockIssuedDuringPeriodValueOther / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember |  |
Issuance of Ordinary shares related to SEDA, net of issuance costs (see note 12a2) |  | 51,334 us-gaap_StockIssuedDuringPeriodSharesOther / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Share-based compensation expense | 211 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation |  | 211 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember |  |
Share-based compensation expense, shares |  | 39,722 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Net loss |  |  |  |  |
Balance at Dec. 31, 2013 | 3,703 us-gaap_StockholdersEquity |  | 74,812 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember | (243)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (70,866)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance, shares at Dec. 31, 2013 |  | 1,258,245 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of Ordinary shares related to SEDA, net of issuance costs (see note 12a2) | 1,275 us-gaap_StockIssuedDuringPeriodValueOther |  | 1,275 us-gaap_StockIssuedDuringPeriodValueOther / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember |  |
Issuance of Ordinary shares related to SEDA, net of issuance costs (see note 12a2) |  | 370,413 us-gaap_StockIssuedDuringPeriodSharesOther / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of Ordinary shares | 467 us-gaap_StockIssuedDuringPeriodValueNewIssues |  | 467 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember |  |
Issuance of ordinary shares, shares |  | 128,147 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Share-based compensation expense | 285 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation |  | 285 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember |  |
Share-based compensation expense, shares |  | 45,887 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Net loss | (433)us-gaap_NetIncomeLoss |  |  |  | (433)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance at Dec. 31, 2014 | $ 5,297 us-gaap_StockholdersEquity |  | $ 76,839 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember | $ (243)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ (71,299)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance, shares at Dec. 31, 2014 |  | 1,802,692 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |

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