Annual report pursuant to Section 13 and 15(d)

Leases - Summary of Property, Plant and Equipment (Detail)

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Leases - Summary of Property, Plant and Equipment (Detail) - Machinery and Equipment [Member] - USD ($)
$ in Thousands
Mar. 31, 2018
Mar. 31, 2017
Capital Leased Assets [Line Items]    
Machinery and equipment $ 364 $ 364
Less accumulated amortization 192 119
Net Machinery and equipment $ 172 $ 245