Income Tax (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Deferred Tax Liabilities, Other	$ 972	$ 0
Current:
Federal income tax statutory rate	35.00%	35.00%	35.00%
Increase (decrease) resulting from:
State income taxes, net of Federal benefit	(5.20%)	2.00%	4.20%
Research and development tax credits	(23.40%)	(4.40%)	(5.30%)
Qualified production activities income deduction	(0.00%)	(5.40%)	(4.90%)
Impairment of goodwill	0.00%	0.00%	5.70%
Stock option deduction	3.70%	0.60%	0.70%
Other non-recurring adjustments for State taxes	0.00%	(1.80%)	0.00%
Meals and entertainment	3.70%	0.80%	1.20%
Acquisition expenses	(3.60%)	(0.00%)	(0.30%)
Foreign rate differential	(10.20%)	(1.60%)	(1.50%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	9.10%	0.00%	0.00%
Other	1.40%	(1.80%)	(3.00%)
Effective income tax rate	10.50%	23.40%	31.80%