CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (116,230)	$ (6,176)	$ (39,111)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	24,440	22,187	26,789
Equity-based compensation	10,499	8,443	8,962
Loss on asset disposals	298	36	221
Loss on disposal of a business	0	0	750
Restructuring and impairment	145,844	539	147,402
Non-cash interest expense	4,623	2,099	10,129
Deferred income tax provision	(35,852)	(334)	(23,030)
Change in fair value of contingent consideration	(2,133)	1,763	(1,604)
Loss on equity investment	61	198	446
(Increase) decrease in assets:
Accounts receivable	15,215	(1,477)	(10,051)
Inventories	47,911	24,636	(232,285)
Prepaid expenses and other current assets	32,147	(17,939)	10,308
Other assets	(1,067)	4,574	(3,188)
Increase (decrease) in liabilities:
Accounts payable	11,652	233	197
Other payables and accrued expenses	(3,998)	(13,381)	(7,643)
Tax receivable agreement liability	(2,795)	(2,602)	(3,227)
Customer deposits	(38,862)	12,040	(14,825)
Net cash provided by (used in) operating activities	91,753	34,839	(129,760)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment and construction in progress	(12,019)	(25,918)	(21,251)
Proceeds from disposal of property and equipment	416	757	567
Cash used for additions to intangible assets	(714)	(909)	(2,823)
Cash received (used) in acquisitions	713	(5,712)	(28,882)
Proceeds from disposal of a business	0	45,100	788
Net cash (used in) provided by investing activities	(11,604)	13,318	(51,601)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net (payments) borrowings from floor plan	(23,704)	(45,638)	219,688
Proceeds from long-term debt	27,524	43,392	30,000
Payments on long-term debt	(42,146)	(78,381)	(18,338)
Payments of debt issuance costs	(935)	(2,221)	0
Payments of contingent consideration	(2,419)	(5,888)	(12,574)
Proceeds from issuance of Class A common stock as part of employee stock purchase plan	1,187	1,520	2,092
Payments of tax withholdings for equity-based awards	(1,846)	(2,641)	(1,971)
Distributions to members	(275)	(5,415)	(3,603)
Purchase of non-controlling interest	0	(18,840)	0
Repurchase and retirement of Class A common stock	0	0	(1,579)
Net cash (used in) provided by financing activities	(42,614)	(114,112)	213,715
Effects of exchange rate changes on cash and restricted cash	(52)	(18)	9
Net change in cash and restricted cash	37,483	(65,973)	32,363
Cash and restricted cash at beginning of period	27,337	93,310	60,947
Cash and restricted cash at end of period	64,820	27,337	93,310
Supplemental cash flow disclosures
Cash paid for interest	61,041	75,957	49,508
Cash (received) paid for income taxes and income tax refunds	(5,936)	5,495	23,322
Noncash items
Acquisition purchase price funded by contingent consideration	0	0	2,550
Purchase of property and equipment funded by long-term debt	219	156	1,122
Acquisition purchase price funded by affiliate financing	0	0	10,600
Settlement of affiliate financing with proceeds from sale and leaseback	$ 0	$ 0	$ 10,600