Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Costs and expenses:
Total share-based compensation	$ 3,295	$ 3,472	$ 2,490
Income tax benefit	(1,018)	(1,054)	(794)
Decrease in net income	(2,277)	(2,418)	(1,696)
Cost of revenue [Member]
Costs and expenses:
Total share-based compensation	404	373	348
Research and development costs [Member]
Costs and expenses:
Total share-based compensation	318	396	323
Selling, general and administrative [Member]
Costs and expenses:
Total share-based compensation	$ 2,573	$ 2,703	$ 1,819