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Intangible Assets - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]        
Intangible amortization expense $ 45 $ 45 $ 135 $ 135
Future amortization expenses, remainder of fiscal, 2014 45   45  
Future amortization expenses, 2015 180   180  
Future amortization expenses, 2016 180   180  
Future amortization expenses, 2017 180   180  
Future amortization expenses, 2018 $ 180   $ 180