Annual report pursuant to Section 13 and 15(d)

The Company and Its Accounting Policies - Summary of Costs and Estimated Earnings on Contracts (Detail)

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The Company and Its Accounting Policies - Summary of Costs and Estimated Earnings on Contracts (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Mar. 31, 2016
Accounting Policies [Abstract]    
Costs incurred since inception on contracts in progress $ 44,263 $ 35,893
Estimated earnings since inception on contracts in progress 4,348 1,185
Costs and estimated earnings 48,611 37,078
Less billings to date 52,410 38,267
Net under (over) billings $ (3,799) $ (1,189)