Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Components of Property and Equipment
Property and equipment, gross	$ 30,361	$ 25,700
Accumulated depreciation	(14,821)	(11,956)
Property and equipment, net	15,540	13,744
Depreciation expense	5,200	3,800	$ 3,200
Machinery
Components of Property and Equipment
Property and equipment, gross	7,734	4,743
Computer equipment
Components of Property and Equipment
Property and equipment, gross	12,793	11,339
Furniture and fixtures
Components of Property and Equipment
Property and equipment, gross	2,445	2,484
Leasehold improvements
Components of Property and Equipment
Property and equipment, gross	$ 7,389	$ 7,134