v2.4.1.9
Subsequent events (Details) (Subsequent Event [Member], USD $)
In Thousands, except Share data, unless otherwise specified
0 Months Ended 3 Months Ended
Mar. 05, 2015
Mar. 31, 2015
Subsequent Event [Member]
   
Subsequent Event [Line Items]    
Ordinary shares issued to employees, directors and consultants 180,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Grant date fair value for ordinary shares issued to independent directors and certain employees $ 0.70us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Compensation expense   $ 126,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember