CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Cash flows from operating activities:
Net loss	$ (175,383)	$ (165,585)	$ (172,368)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	11,374	11,297	9,360
Amortization of intangible assets	8,317	6,886	8,842
Amortization of capitalized internal-use software costs	28,863	26,934	19,025
Amortization of debt discount and issuance costs	20,404	16,898	14,045
Amortization of deferred sales commission costs	34,701	27,817	19,541
Allowance for credit losses	1,974	4,471	3,479
Operating lease expense	13,482	15,210	14,971
Stock-based compensation expense	133,331	107,638	70,878
Other	3,726	1,521	3,522
Changes in assets and liabilities:
Accounts receivable	6,867	(14,869)	(12,737)
Deferred sales commission costs	(44,224)	(52,960)	(46,421)
Other current and non-current assets	(4,022)	(3,963)	(33,137)
Accounts payable and accruals	(8,740)	(10,033)	2,159
Deferred revenue	4,010	14,672	4,936
Net cash provided by (used in) operating activities	34,680	(14,066)	(93,905)
Cash flows from investing activities:
Purchases of property and equipment	(4,137)	(6,430)	(35,834)
Capitalized internal-use software costs	(20,370)	(28,816)	(31,573)
Purchases of investments	(83,383)	(52,172)	(42,223)
Sales of investments	13,299	1,018	36,515
Proceeds from maturities of investments	60,023	60,479	25,950
Acquisition of businesses, net of cash acquired	(125,410)	(10,400)	(59,129)
Net cash used in investing activities	(159,978)	(36,321)	(106,294)
Cash flows from financing activities:
Finance lease payments	(15)	(78)	(315)
Tax-related withholding of common stock	(310)	(69)	(6,550)
Proceeds from issuance of common stock under employee stock plans	16,107	13,339	14,330
Purchases of capped calls	0	0	(9,288)
Repurchase of common stock	(44,976)	0	0
Net proceeds from issuance of convertible senior notes	134,619	0	73,918
Net cash provided by financing activities	105,425	13,192	72,095
Effect of exchange rate changes on cash	(585)	1,956	(168)
Net decrease in cash, cash equivalents and restricted cash	(20,458)	(35,239)	(128,272)
Cash, cash equivalents and restricted cash, beginning of year	121,172	156,411	284,683
Cash, cash equivalents and restricted cash, end of year	100,714	121,172	156,411
Supplemental Cash Flow Information [Abstract]
Right-of-use assets obtained in exchange for new and modified operating lease liabilities	0	0	79,100
Right-of-use assets acquired in connection with Fuze acquisition	7,261	0	0
Business combination, value of stock issued	80,856	0	0
Payables for fixed assets	88	0	0
Interest paid	2,156	1,813	1,553
Income taxes paid	1,320	555	934
Reconciliation Of Cash, Cash Equivalents And Restricted Cash [Abstract]
Cash and cash equivalents	91,205	112,531	137,394
Restricted cash, current	8,691	8,179	10,376
Restricted cash, non-current	818	462	8,641
Total cash, cash equivalents and restricted cash	$ 100,714	$ 121,172	$ 156,411