Cash Flow Statement - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 2	$ 3
Income taxes paid	43	324
Excess tax (deficiency) benefit on stock awards	(35)	12
Capital expenditures incurred but not yet paid	$ 0	$ 22