Business Segments - Geographic Information about Property, Plant and Equipment Associated with Particular Regions (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 12,513	$ 43,438
North America
Segment Reporting Information [Line Items]
Property, plant and equipment, net	11,933	42,699
Europe
Segment Reporting Information [Line Items]
Property, plant and equipment, net	478	602
Asia Pacific
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 102	$ 137