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SHAREHOLDERS' EQUITY (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 06, 2014 | Jan. 22, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Aug. 05, 2014 | Jun. 30, 2013 | Aug. 31, 2012 | Feb. 29, 2012
Stockholders' Equity, Reverse Stock Split |  |  | All Ordinary shares, options, per share data and exercise price included in these financial statements for all periods presented have been retroactively adjusted to reflect the issuance on January 26, 2014 of 6.55-to-one bonus shares (equivalent to a 7.55-for-1 stock split). |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  | 7,551,427 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  | $ 31,405 us-gaap_StockIssuedDuringPeriodValueNewIssues |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |  |  | 5 years 7 months 6 days |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term |  |  | 2 years 3 months 18 days |  |  |  |  |
Stock Issued During Period Ordinary Shares Issued Upon Private Placement Shares | 782,537 orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementShares |  |  |  |  |  |  |
Stock Issued During Period Ordinary Shares Issued Upon Private Placement Value | 4,368 orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementValue |  | 4,368 orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementValue |  |  |  |  |
Development Stage Entities, Equity Issuance, Per Share Amount |  |  | $ 0.95 us-gaap_EquityIssuancePerShareAmount | $ 0.95 us-gaap_EquityIssuancePerShareAmount |  |  |  |
IPO [Member] |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  | 3,200,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  | 3,200 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |  |  |
Development Stage Entities, Equity Issuance, Per Share Amount |  |  | $ 11 us-gaap_EquityIssuancePerShareAmount / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |  | $ 11.00 us-gaap_EquityIssuancePerShareAmount / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  | 3,200,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  | 9 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Stock Issued During Period Ordinary Shares Issued Upon Private Placement Shares |  |  | 782,537 orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Stock Issued During Period Ordinary Shares Issued Upon Private Placement Value |  |  | 3 orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Employee Stock Option [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value |  |  | 2,664 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_EmployeeStockOptionMember |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value |  |  | 2,174 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_EmployeeStockOptionMember |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized |  |  | 889 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_EmployeeStockOptionMember |  |  |  |  |
Purchase Agreement [Member] |  |  |  |  |  |  |  |
Share Purchase Agreement, Shares to be issued |  |  |  |  |  | 2,130,159 orpn_SharePurchaseAgreementSharesToBeIssued / orpn_AgreementAxis = orpn_PurchaseAgreementMember |  |
Share Purchase Agreement, Value to be issued |  |  |  |  |  | 2,024 orpn_SharePurchaseAgreementValueToBeIssued / orpn_AgreementAxis = orpn_PurchaseAgreementMember |  |
Series A Preferred Stock [Member] | Investment Agreement [Member] |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  |  |  | 94,393 us-gaap_StockIssuedDuringPeriodSharesNewIssues / orpn_AgreementAxis = orpn_InvestmentAgreementMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | 471,964 us-gaap_StockIssuedDuringPeriodSharesNewIssues / orpn_AgreementAxis = orpn_InvestmentAgreementMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  | 50 us-gaap_StockIssuedDuringPeriodValueNewIssues / orpn_AgreementAxis = orpn_InvestmentAgreementMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | 250 us-gaap_StockIssuedDuringPeriodValueNewIssues / orpn_AgreementAxis = orpn_InvestmentAgreementMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember
Payments of Stock Issuance Costs |  |  |  |  |  |  | 5 us-gaap_PaymentsOfStockIssuanceCosts / orpn_AgreementAxis = orpn_InvestmentAgreementMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |
Series A Preferred Stock [Member] | Purchase Agreement [Member] |  |  |  |  |  |  |  |
Preferred Stock, Conversion Basis |  |  |  | Prior to the closing of the share purchase agreement above and as a condition to it, the Company affected an equity restructuring, under which, all of the Company's Preferred shares (566,357 Preferred A shares) were converted into Ordinary shares at a 1:1 ratio |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost |  |  |  | 183 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost / orpn_AgreementAxis = orpn_PurchaseAgreementMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |
Dividends, Preferred Stock |  |  |  | $ 26 us-gaap_DividendsPreferredStock / orpn_AgreementAxis = orpn_PurchaseAgreementMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |

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