Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Additional Information (Detail)

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Intangible Assets - Additional Information (Detail) (USD $)
12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]      
Intangible amortization expense $ 180,000 $ 180,000 $ 250,000
Future amortization expenses, 2015 180,000    
Future amortization expenses, 2016 180,000    
Future amortization expenses, 2017 180,000    
Future amortization expenses, 2018 180,000    
Future amortization expenses, 2019 180,000    
Goodwill 6,938,000 6,938,000  
Change in goodwill during the period $ 0 $ 0