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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Sep. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Mar. 31, 2014
Payables And Accruals [Abstract]            
Accounts payable $ 6,942   $ 7,062      
Accrued inventories in-transit 1,241   1,127      
Accrued other miscellaneous expenses 3,413   3,254      
Accrued compensation 5,166   5,960      
Income taxes payable 851   278      
Accrued warranty 3,110 $ 3,273 3,934 $ 4,115 $ 3,367 $ 3,207
Total $ 20,723   $ 21,615