CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net income	$ 15,908	$ 60,899
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	8,702	5,806
Stock-based compensation expense	3,625	3,062
Inventory impairments and abandonments	528	0
Expense from income taxes	1,426	7,920
Gain on disposal of fixed assets	(130)	(194)
Gain on sale of investment	0	(8,591)
Loss on extinguishment of debt, net	0	437
Changes in operating assets and liabilities:
Increase in accounts receivable	(2,438)	(8,628)
Increase in income tax receivable	0	(246)
Increase in inventory	(191,047)	(299,116)
Decrease in other assets	1,386	4,350
Increase in trade accounts payable	20,022	14,413
Decrease in other liabilities	(13,916)	(19,685)
Net cash used in operating activities	(155,934)	(239,573)
Cash flows from investing activities:
Capital expenditures	(13,061)	(11,501)
Proceeds from sale of fixed assets	130	194
Purchases of investment securities	(568)	(7,454)
Proceeds from maturities in investment securities	4,098	0
Net cash used in investing activities	(9,401)	(18,761)
Cash flows from financing activities:
Repayment of debt	0	(202,195)
Proceeds from issuance of debt	0	250,000
Repayment of borrowings from credit facility	(165,000)	(115,000)
Borrowings from credit facility	220,000	115,000
Debt issuance costs	(230)	(5,162)
Repurchase of common stock	(20,562)	0
Tax payments for stock-based compensation awards	(3,121)	(5,220)
Stock option exercises	106	16
Net cash provided by financing activities	31,193	37,439
Net decrease in cash, cash equivalents, and restricted cash	(134,142)	(220,895)
Cash, cash equivalents, and restricted cash at beginning of period	242,610	386,289
Cash, cash equivalents, and restricted cash at end of period	$ 108,468	$ 165,394