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ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Sep. 30, 2022
Changes in foreign currency translation          
Beginning accumulated foreign currency translation $ 224 $ 237 $ 222 $ 262  
Change in cumulative translation adjustment before reclassifications 0 12 2 (13)  
Income taxes 0 0 0 0  
Net current period other comprehensive income (loss) 0 12 2 (13)  
Ending accumulated foreign currency translation 224 249 224 249  
Changes in retirement plans          
Beginning accumulated retirement plans benefit income (cost) 1,052 (230) 1,072 (230)  
Amortization of net actuarial gain (20) 0 (40) 0  
Income taxes 0 0 0 0  
Net current period other comprehensive (loss) (20) 0 (40) 0  
Ending accumulated retirement plans benefit income (cost) 1,032 (230) 1,032 (230)  
Accumulated other comprehensive income, net of taxes $ 1,256 $ 19 $ 1,256 $ 19 $ 1,294