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Schedule of Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Allowance for doubtful accounts receivable      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year $ 382 $ 261 $ 101
Charged to costs and expenses 191 215 347
Deduction (543) (94) (187)
Balance at end of year 30 382 261
Allowance for doubtful notes receivable      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 102 182 0
Charged to costs and expenses 753 (80) 602
Deduction (855) 0 (420)
Balance at end of year 0 102 182
Deferred tax asset valuation allowance      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 641 1,273 0
Charged to costs and expenses 343 0 1,273
Deduction 0 (632) 0
Balance at end of year $ 984 $ 641 $ 1,273