Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Additional Information (Detail)

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Intangible Assets - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Goodwill And Intangible Assets Disclosure [Abstract]        
Intangible amortization expense $ 45 $ 45 $ 90 $ 90
Future amortization expenses, remainder of fiscal, 2014 90   90  
Future amortization expenses, 2015 180   180  
Future amortization expenses, 2016 180   180  
Future amortization expenses, 2017 180   180  
Future amortization expenses, 2018 $ 180   $ 180