CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net (loss) income	$ (28,247)	$ 18,568
Adjustments to reconcile net (loss) income to net cash provided by operations:
Depreciation and amortization	10,033	13,574
Provision for (benefit from) credit loss reserve	3,626	(418)
Stock-based compensation	24,827	16,767
Non-cash interest expense	910	2,595
Deferred tax (benefit)	(422)	(2,162)
Unrealized foreign currency transaction (gain) losses	(6,461)	2,320
Other	(608)	184
Changes in operating assets and liabilities:
Accounts receivable	(14,836)	(3,557)
Prepaid expenses and other assets	13,014	(36,354)
Deferred costs	2,559	2,896
Accounts payable	7,864	6,293
Accrued expenses and other liabilities	2,930	(2,115)
Deferred revenue	(10,752)	(11,848)
Net cash provided by operating activities	4,437	6,743
Cash flows from investing activities:
Capital expenditures	(2,077)	(9,985)
Purchases of marketable securities	(11,045)	(13,115)
Sale and maturities of marketable securities	15,900	16,453
Payments for equity investments		(584)
Other investing activities	(552)	1,266
Net cash provided by (used in) investing activities	2,226	(5,965)
Cash flows from financing activities:
Payments for long-term debt issuance costs	(403)
Principal payments of long-term debt	(4,688)	(3,126)
Common stock repurchases for tax withholdings for net settlement of equity awards	(4,430)	(46,423)
Principal payment of lease liabilities arising from a finance lease	(316)	(246)
Proceeds from the issuance of common stock	4,394	33,459
Net cash used in financing activities	(5,443)	(16,336)
Effects of exchange rate changes on cash and cash equivalents	(690)	(1,051)
Net change in cash and cash equivalents	530	(16,609)
Cash and cash equivalents at beginning of period	94,847	128,428
Cash and cash equivalents at end of period	95,377	111,819
Supplemental information:
Cash paid for income taxes	4,053	6,594
Cash paid for interest	$ 6,492	$ 4,151