CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net loss	$ (98,720)	$ (31,091)	$ (7,314)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	5,350	4,257	3,154
Stock-based compensation	68,290	18,064	4,082
Amortization of debt discount (accretion of debt premium) and issuance costs	27,531
Amortization of intangible assets	5,659
Amortization of premium (accretion of discount) on investments in marketable debt securities	4,692	(3,815)	(1,319)
Non-cash operating lease expense	3,813
Provision for losses on acquired card receivables	741
Deferred income taxes	(40,617)		(176)
Other		717	299
Changes in assets and liabilities:
Accounts receivable	(6,535)	(1,054)	(2,098)
Unbilled revenue	(1,569)	(554)	(1,748)
Prepaid expenses and other current assets	2,275	(10,434)	(5,690)
Other assets	(12,525)	(4,928)	(995)
Accounts payable	7,417	(1,596)	3,171
Other accruals and current liabilities	22,980	9,755	4,336
Operating lease liabilities	8,395
Other long-term liabilities	592	12,991	302
Deferred revenue	6,854	3,258	47
Net cash provided by (used in) operating activities	4,623	(4,430)	(3,949)
Cash flows from investing activities:
Cash paid for acquisition, net of acquired cash	(556,090)
Purchases of corporate and customer fund short-term investments	(2,070,296)	(1,088,611)	(830,622)
Proceeds from maturities of corporate and customer fund short-term investments	1,104,532	806,000	694,303
Proceeds from sale of corporate and customer fund short-term investments	142,665	46,159	54,715
Increase in other receivables included in funds held for customers	(10,792)	(959)	(10,203)
Increase in acquired card receivables	(15,703)
Purchases of property and equipment	(18,902)	(11,437)	(2,743)
Capitalization of internal-use software costs	(2,304)	(639)	(1,556)
Net cash used in investing activities	(1,426,890)	(249,487)	(96,106)
Cash flows from financing activities:
Proceeds from issuance of convertible senior notes, net of discount and issuance costs	1,129,379
Purchase of capped calls	(87,860)
Proceeds from issuance of common stock upon initial public offering, net of underwriting discounts and commissions and other offering costs		225,481
Proceeds from issuance of common stock upon follow-on public offering, net of underwriting discounts and commissions and other offering costs	8,864	308,176
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs			85,160
Increase in customer fund deposits liability	564,348	314,944	414,293
Proceeds from line of credit borrowings		2,300
Payments on line of credit and bank borrowings	(2,300)		(9,500)
Proceeds from exercise of stock options	28,209	12,232	1,702
Other	(1,057)	(7)
Net cash provided by financing activities	1,639,583	863,126	491,655
Net increase in cash, cash equivalents, restricted cash, and restricted cash equivalents	217,316	609,209	391,600
Cash, cash equivalents, restricted cash, and restricted cash equivalents, beginning of year	1,592,377	983,168	591,568
Cash, cash equivalents, restricted cash, and restricted cash equivalents, end of year	1,809,693	1,592,377	983,168
Reconciliation of cash, cash equivalents, restricted cash, and restricted cash equivalents within the consolidated balance sheets to the amounts shown in the consolidated statements of cash flows above:
Cash and cash equivalents	509,615	573,643	90,306
Restricted cash included in other current assets	$ 10,977	$ 35	$ 256
Restricted Cash, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsCurrent	us-gaap:OtherAssetsCurrent	us-gaap:OtherAssetsCurrent
Restricted cash included in other long-term assets	$ 6,875		$ 550
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets	Other assets
Restricted cash and restricted cash equivalents included in funds held for customers	$ 1,282,226	$ 1,018,699	$ 892,056
Cash, cash equivalents, restricted cash, and restricted cash equivalents, end of year	1,809,693	1,592,377	983,168
Supplemental disclosure of cash flow information:
Cash paid for interest	112	174	872
Noncash investing and financing activities:
Fair value of shares issued as consideration for acquisition	1,603,543
Fair value of stock-based awards assumed in acquisition	55,275
Payable on purchases of property and equipment	664
Conversion of redeemable convertible preferred stock into common stock upon initial public offering		276,307
Reclassification of redeemable convertible preferred stock warrant liabilities into additional paid-in capital upon initial public offering		1,405
Receivable from broker-assisted exercises of stock options		1,228
Accrued stock and debt issuance costs	$ 120	$ 664	$ 470