CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Total revenue	$ 151,557	$ 129,133	$ 299,884	$ 250,940
Operating Expenses [Abstract]
Research and development	28,498	21,567	53,890	43,061
Sales and marketing	76,726	61,399	152,641	121,549
General and administrative	24,023	22,769	50,114	48,559
Total operating expenses	188,714	162,231	375,868	321,798
Loss from operations	(37,157)	(33,098)	(75,984)	(70,858)
Other expense, net	(4,934)	(5,178)	(9,757)	(9,103)
Loss before provision for income taxes	(42,091)	(38,276)	(85,741)	(79,961)
Provision for income taxes	233	137	489	365
Net loss	$ (42,324)	$ (38,413)	$ (86,230)	$ (80,326)
Net loss per share:
Basic (in dollars per share)	$ (0.38)	$ (0.37)	$ (0.78)	$ (0.77)
Diluted (in dollars per share)	$ (0.38)	$ (0.37)	$ (0.78)	$ (0.77)
Weighted-average common shares outstanding:
Basic (in shares)	112,422	104,620	111,180	104,116
Diluted (in shares)	112,422	104,620	111,180	104,116
Service
Total revenue	$ 142,376	$ 120,942	$ 280,172	$ 235,125
Operating Expenses [Abstract]
Cost of revenue	47,198	44,803	93,208	85,799
Other
Total revenue	9,181	8,191	19,712	15,815
Operating Expenses [Abstract]
Cost of revenue	$ 12,269	$ 11,693	$ 26,015	$ 22,830