Summary of Significant Accounting Policies - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Costs and expenses:
Total share-based compensation	$ 4,891	$ 3,116
Income tax benefit	(1,215)	(753)
Decrease in net income	3,676	2,363
Cost of Revenue
Costs and expenses:
Total share-based compensation	463	233
Research and Development Costs
Costs and expenses:
Total share-based compensation	1,028	610
Selling, General and Administrative
Costs and expenses:
Total share-based compensation	$ 3,400	$ 2,273