Summary of Significant Accounting Policies - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Costs and expenses:
Total share-based compensation	$ 3,453	$ 2,001	$ 8,585	$ 5,177
Income tax benefit	(1,080)	(718)	(2,940)	(1,825)
Decrease in net income	2,373	1,283	5,645	3,352
Cost of revenue [Member]
Costs and expenses:
Total share-based compensation	259	144	686	459
Research and development costs [Member]
Costs and expenses:
Total share-based compensation	557	273	1,431	690
Selling, general and administrative
Costs and expenses:
Total share-based compensation	$ 2,637	$ 1,584	$ 6,468	$ 4,028