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 income	$ 59,038	$ 79,557
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	5,533	5,912
Stock-based compensation expense	3,258	4,532
Inventory impairments and abandonments	301	935
Deferred and other income tax expense	9,225	16,531
Loss (gain) on disposal of fixed assets	1,265	(159)
Loss on extinguishment of debt, net	515	164
Changes in operating assets and liabilities:
Decrease in accounts receivable	7,429	1,396
Decrease in income tax receivable	9,667	0
Increase in inventory	(2,275)	(174,225)
(Increase) decrease in other assets	(1,755)	906
(Decrease) increase in trade accounts payable	(18,401)	13,866
Decrease in other liabilities	(33,532)	(7,545)
Net cash provided by (used in) operating activities	40,268	(58,130)
Cash flows from investing activities:
Capital expenditures	(7,824)	(6,195)
Proceeds from sale of fixed assets	52	159
Other	(2)	0
Net cash used in investing activities	(7,774)	(6,036)
Cash flows from financing activities:
Repayment of debt	0	(6,113)
Debt issuance costs	(2,575)	0
Tax payments for stock-based compensation awards	(2,597)	(6,620)
Stock option exercises	0	4
Net cash used in financing activities	(5,172)	(12,729)
Net increase (decrease) in cash, cash equivalents, and restricted cash	27,322	(76,895)
Cash, cash equivalents, and restricted cash at beginning of period	251,828	274,143
Cash, cash equivalents, and restricted cash at end of period	$ 279,150	$ 197,248