Annual report pursuant to Section 13 and 15(d)

Description of the Company and Basis of Presentationtion (Details)

v2.4.1.9
Description of the Company and Basis of Presentationtion (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Description of the Company and Basis of Presentation        
Loss from operations $ (30,909)us-gaap_OperatingIncomeLoss $ (15,314)us-gaap_OperatingIncomeLoss $ (21,958)us-gaap_OperatingIncomeLoss  
Cash and cash equivalents $ 32,221us-gaap_CashAndCashEquivalentsAtCarryingValue $ 27,859us-gaap_CashAndCashEquivalentsAtCarryingValue $ 38,817us-gaap_CashAndCashEquivalentsAtCarryingValue $ 49,952us-gaap_CashAndCashEquivalentsAtCarryingValue
Minimum period for which cash and cash equivalents are believed to be sufficient to meet the entity's cash needs 12 months