Debt (Details) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020	Apr. 28, 2022
Debt Disclosure [Abstract]
Revolving loan	$ 82,659,000	$ 40,339,000
Other long-term debt	0	63,000
Long-term debt	81,628,000	39,746,000
Debt Issuance Costs, Noncurrent, Net	1,031,000	656,000
Letters of Credit Outstanding, Amount	4,077,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 63,263,000
Line of Credit Facility, Interest Rate at Period End	4.98%
Interest expense	$ 2,970,000	$ 962,000	$ 777,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 150,000,000			$ 125,000,000
Fixed Charge Coverage Ratio	1.6
Loans Payable	$ 82,659,000
ControllingShareholderOwnershipPercentage	57.00%
Liquidity	$ 88,112,000