Annual report pursuant to Section 13 and 15(d)

The Company and Its Accounting Policies - Accompanying Consolidated Balance Sheets (Detail)

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The Company and Its Accounting Policies - Accompanying Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Mar. 31, 2016
Accounting Policies [Abstract]    
Unbilled revenue $ 15,842 $ 11,852
Progress payments reducing inventory (Note 2) (7,234) (4,641)
Customer deposits (12,407) (8,400)
Net under (over) billings $ (3,799) $ (1,189)