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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   7,551,427us-gaap_StockIssuedDuringPeriodSharesNewIssues            
Stock Issued During Period, Value, New Issues     $ 31,405us-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 782,537orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementShares              
Stock Issued During Period Ordinary Shares Issued Upon Private Placement Value 4,368orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementValue   4,368orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementValue          
Development Stage Entities, Equity Issuance, Per Share Amount     $ 0.95us-gaap_EquityIssuancePerShareAmount $ 0.95us-gaap_EquityIssuancePerShareAmount        
IPO [Member]                
Stock Issued During Period, Shares, New Issues         3,200,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember		      
Stock Issued During Period, Value, New Issues         3,200us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember		      
Development Stage Entities, Equity Issuance, Per Share Amount     $ 11us-gaap_EquityIssuancePerShareAmount
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember		   $ 11.00us-gaap_EquityIssuancePerShareAmount
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember		      
Common Stock [Member]                
Stock Issued During Period, Shares, New Issues     3,200,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		          
Stock Issued During Period, Value, New Issues     9us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		          
Stock Issued During Period Ordinary Shares Issued Upon Private Placement Shares     782,537orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		          
Stock Issued During Period Ordinary Shares Issued Upon Private Placement Value     3orpn_StockIssuedDuringPeriodOrdinarySharesIssuedUponPrivatePlacementValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		          
Employee Stock Option [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value     2,664us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember		          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value     2,174us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember		          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized     889us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember		          
Purchase Agreement [Member]                
Share Purchase Agreement, Shares to be issued           2,130,159orpn_SharePurchaseAgreementSharesToBeIssued
/ orpn_AgreementAxis
= orpn_PurchaseAgreementMember		    
Share Purchase Agreement, Value to be issued           2,024orpn_SharePurchaseAgreementValueToBeIssued
/ orpn_AgreementAxis
= orpn_PurchaseAgreementMember		    
Series A Preferred Stock [Member] | Investment Agreement [Member]                
Stock Issued During Period, Shares, New Issues             94,393us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ orpn_AgreementAxis
= orpn_InvestmentAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		 471,964us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ orpn_AgreementAxis
= orpn_InvestmentAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
Stock Issued During Period, Value, New Issues             50us-gaap_StockIssuedDuringPeriodValueNewIssues
/ orpn_AgreementAxis
= orpn_InvestmentAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		 250us-gaap_StockIssuedDuringPeriodValueNewIssues
/ orpn_AgreementAxis
= orpn_InvestmentAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
Payments of Stock Issuance Costs             5us-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       183us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
/ orpn_AgreementAxis
= orpn_PurchaseAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		        
Dividends, Preferred Stock       $ 26us-gaap_DividendsPreferredStock
/ orpn_AgreementAxis
= orpn_PurchaseAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember