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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Sep. 30, 2021
Changes in foreign currency translation          
Beginning accumulated foreign currency translation $ 237 $ 311 $ 262 $ 545  
Change in cumulative translation adjustment before reclassifications 12 (85) (13) (319)  
Income taxes 0 0 0 0  
Net current period other comprehensive income (loss) 12 (85) (13) (319)  
Ending accumulated foreign currency translation 249 226 249 226  
Changes in retirement plans          
Beginning accumulated retirement plans benefit cost (230) (1,947) (230) (1,980)  
Amortization of net actuarial loss 0 33 0 66  
Income taxes 0 0 0 0  
Net current period other comprehensive income 0 33 0 66  
Ending accumulated retirement plans benefit cost (230) (1,914) (230) (1,914)  
Accumulated other comprehensive income (loss), net of taxes $ 19 $ (1,688) $ 19 $ (1,688) $ 32