Accrued Expenses and Other (Warranty Accrual) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning of year	$ 864	$ 1,015
Provision to product cost of revenue	(102)	159
Charges	(3)	(310)
End of year	$ 759	$ 864