Annual report pursuant to Section 13 and 15(d)

Description of the Company and Basis of Presentation (Details)

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Description of the Company and Basis of Presentation (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Description of the Company and Basis of Presentation        
Loss from operations $ (15,314) $ (21,958) $ (31,737)  
Cash and cash equivalents $ 27,859 $ 38,817 $ 49,952 $ 33,456
Minimum period for which cash and cash equivalents are believed to be sufficient to meet the entity's cash needs 12 months