Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v2.4.1.9
Basis of Presentation (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Dec. 31, 2012
Description of the Company and Basis of Presentation            
Loss from operations $ (3,757)us-gaap_OperatingIncomeLoss $ (1,923)us-gaap_OperatingIncomeLoss $ (16,787)us-gaap_OperatingIncomeLoss $ (12,208)us-gaap_OperatingIncomeLoss    
Cash and cash equivalents $ 40,890us-gaap_CashAndCashEquivalentsAtCarryingValue $ 31,571us-gaap_CashAndCashEquivalentsAtCarryingValue $ 40,890us-gaap_CashAndCashEquivalentsAtCarryingValue $ 31,571us-gaap_CashAndCashEquivalentsAtCarryingValue $ 27,859us-gaap_CashAndCashEquivalentsAtCarryingValue $ 38,817us-gaap_CashAndCashEquivalentsAtCarryingValue
Minimum period for which cash and cash equivalents are believed to be sufficient to meet the entity's cash needs     12 months