Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Costs and expenses:
Total share-based compensation	$ 1,918	$ 901	$ 3,177	$ 1,585
Income tax benefit	(695)	(276)	(1,107)	(476)
Decrease in net income	1,223	625	2,070	1,109
Cost of revenue [Member]
Costs and expenses:
Total share-based compensation	166	102	315	199
Research and development costs [Member]
Costs and expenses:
Total share-based compensation	334	103	417	213
Selling, general and administrative [Member]
Costs and expenses:
Total share-based compensation	$ 1,418	$ 696	$ 2,445	$ 1,173