Summary of Significant Accounting Policies - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Costs and expenses:
Total share-based compensation	$ 3,116	$ 2,041
Income tax benefit	(753)	(716)
Decrease in net income	2,363	1,325
Cost of Revenue
Costs and expenses:
Total share-based compensation	233	137
Research and Development Costs
Costs and expenses:
Total share-based compensation	610	361
Selling, General and Administrative
Costs and expenses:
Total share-based compensation	$ 2,273	$ 1,543