STOCK-BASED COMPENSATION: Effect of Stock-based Compensation Expense on Income, by Financial Statement Line Item (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Share-based compensation
Total non-cash stock-based compensation	$ 51,518	$ 37,717
Cost of revenue
Share-based compensation
Total non-cash stock-based compensation	2,456	1,738
Research and development
Share-based compensation
Total non-cash stock-based compensation	24,016	12,532
Sales and marketing
Share-based compensation
Total non-cash stock-based compensation	12,000	13,542
General and administrative
Share-based compensation
Total non-cash stock-based compensation	$ 13,046	$ 9,905