Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018
Cash flows from operating activities
Net loss	$ (167,174)	$ (102,303)	$ (52,727)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	12,859	5,695	5,066
Amortization of deferred contract acquisition costs	28,314	21,374	12,731
Non-cash operating lease cost	7,422
Stock-based compensation expense	60,007	39,942	12,742
Non-cash acquisition expense settled with shares	8,834	0	0
Deferred income taxes	(1,539)	3,621	(323)
Other	1,123	69	1
Changes in operating assets and liabilities, net of impact of business acquisitions:
Accounts receivable, net	(46,753)	(29,804)	(21,606)
Deferred contract acquisition costs	(46,217)	(30,006)	(20,497)
Prepaid expenses and other current assets	(2,950)	(18,049)	(6,920)
Other assets	5,603	(3,292)	(8,502)
Accounts payable	5,968	2,226	(23)
Accrued expenses and other liabilities	5,220	10,872	5,380
Accrued compensation and benefits	19,710	3,842	8,045
Operating lease liabilities	(6,661)
Deferred revenue	85,670	71,876	45,814
Net cash used in operating activities	(30,564)	(23,937)	(20,819)
Cash flows from investing activities
Purchases of property and equipment	(5,063)	(3,447)	(2,968)
Maturities of short-term investments	0	0	15,000
Business acquisitions, net of cash acquired	(24,373)	(1,986)	(3,702)
Other	249	(2,850)	0
Net cash provided by (used in) investing activities	(29,187)	(8,283)	8,330
Cash flows from financing activities
Net proceeds from issuance of ordinary shares in initial public offering	0	269,514	0
Proceeds from issuance of ordinary shares upon exercise of stock options	61,463	18,552	2,337
Proceeds from the issuance of ordinary shares related to early exercise of stock options	0	0	1,566
Repurchase of ordinary shares	0	0	(344)
Repurchase of early exercised options	0	(500)	0
Repayment of notes payable	(90)	(106)	(132)
Payment of deferred offering costs	0	(5,672)	0
Payment of withholding taxes related to acquisition expense settled in shares	(2,834)	0	0
Net cash provided by financing activities	58,539	281,788	3,427
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	321	(897)	781
Net increase (decrease) in cash, cash equivalents, and restricted cash	(891)	248,671	(8,281)
Cash, cash equivalents, and restricted cash, beginning of period	300,280	51,609	59,890
Cash, cash equivalents, and restricted cash, end of period	299,389	300,280	51,609
Supplemental disclosures of cash flow information
Cash paid for income taxes	3,497	3,067	3,189
Cash paid for operating lease liabilities	7,371
Cash paid for interest	2	9	14
Supplemental disclosures of non-cash investing and financing information
Purchases of property and equipment included in accounts payable	101	157	6
Operating lease right-of-use assets for new lease obligations	12,332
Vesting of early exercised stock options	0	1,019	109
Vesting of shares subject to repurchase	2,730	449	0
Issuance of ordinary shares for business acquisition	178,329	0	12,410
Assumption of stock option plan as consideration for business combination	9,309	0	0
Deferred offering costs accrued, unpaid	$ 0	$ 0	$ 242