Leases - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
Mar. 31, 2015 |
|
Capital Leased Assets [Line Items] | |||
Operating leases expense | $ 615 | $ 677 | $ 596 |
Machinery and Equipment [Member] | |||
Capital Leased Assets [Line Items] | |||
Amortization of machinery and equipment under capital leases | $ 54 | $ 40 | $ 54 |