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Accrued Liabilities (Tables)
 12 Months Ended
Sep. 30, 2021
Payables and Accruals [Abstract]  
Schedule of Accrued Liabilities Accrued liabilities at September 30 consist of:
20212020
Accrued employee compensation and benefits$4,075 $5,476 
Accrued workers’ compensation888 546 
Contract liabilities236 636 
Other accrued liabilities1,672 1,632 
Total accrued liabilities$6,871 $8,290