Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Costs and expenses:
Total share-based compensation	$ 1,259	$ 684
Income tax benefit	(412)	(200)
Decrease in net income	847	484
Cost of revenue [Member]
Costs and expenses:
Total share-based compensation	149	97
Research and development costs [Member]
Costs and expenses:
Total share-based compensation	83	110
Selling, general and administrative [Member]
Costs and expenses:
Total share-based compensation	$ 1,027	$ 477