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Intangible Assets - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Indefinite-lived Intangible Assets [Line Items]        
Intangible amortization expense $ 58 $ 56 $ 112 $ 113
Customer Relationships [Member]
       
Indefinite-lived Intangible Assets [Line Items]        
Intangible amortization expense 45 45 90 90
Future amortization expenses, 2015 90   90  
Future amortization expenses, 2016 180   180  
Future amortization expenses, 2017 180   180  
Future amortization expenses, 2018 180   180  
Future amortization expenses, 2019 $ 180   $ 180