CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities:
Net (loss) income	$ (33,501)	$ 15,908
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Depreciation and amortization	8,126	8,702
Stock-based compensation expense	3,430	3,625
Inventory impairments and abandonments	3,665	528
(Benefit) expense from income taxes	(16,099)	1,426
Gain on disposal of fixed assets	(67)	(130)
Changes in operating assets and liabilities:
Increase in accounts receivable	(7,336)	(2,438)
Increase in income tax receivable	(1,730)	0
Increase in inventory	(224,822)	(191,047)
Decrease in other assets	6,269	1,386
Increase in trade accounts payable	13,502	20,022
Increase (decrease) in other liabilities	19,771	(13,916)
Net cash used in operating activities	(228,792)	(155,934)
Cash flows from investing activities:
Capital expenditures	(13,357)	(13,061)
Proceeds from sale of fixed assets	67	130
Purchases of investment securities	(1,059)	(568)
Proceeds from maturities of investment securities	0	4,098
Net cash used in investing activities	(14,349)	(9,401)
Cash flows from financing activities:
Repayment of borrowings from credit facility	(15,000)	(165,000)
Borrowings from credit facility	210,000	220,000
Debt issuance costs	(1,974)	(230)
Repurchase of common stock	(45,563)	(20,562)
Tax payments for stock-based compensation awards	(2,492)	(3,121)
Stock option exercises	0	106
Net cash provided by financing activities	144,971	31,193
Net decrease in cash, cash equivalents, and restricted cash	(98,170)	(134,142)
Cash, cash equivalents, and restricted cash at beginning of period	218,571	242,610
Cash, cash equivalents, and restricted cash at end of period	$ 120,401	$ 108,468