Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Costs and expenses:
Total share-based compensation	$ 743	$ 970	$ 2,328	$ 2,627
Income tax benefit	(225)	(313)	(701)	(825)
Cost of revenue [Member]
Costs and expenses:
Total share-based compensation	101	105	300	283
Research and development costs [Member]
Costs and expenses:
Total share-based compensation	67	113	280	293
Selling, general and administrative [Member]
Costs and expenses:
Total share-based compensation	$ 575	$ 752	$ 1,748	$ 2,051