Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2016 USD ($) Derivative	Mar. 31, 2015 USD ($) Derivative
Significant Of Accounting Policies [Line Items]
Property, plant, and equipment, net	$ 29,000	$ 77,000
Foreign exchange forward contracts held | Derivative	0	0
Advertising expenses	$ 19,000	$ 0
Accounting Standards Update 2015-17
Significant Of Accounting Policies [Line Items]
Reclassification from current deferred tax assets to noncurrent deferred tax assets	$ 962,000