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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Sep. 30, 2021
Changes in foreign currency translation      
Beginning accumulated foreign currency translation $ 262 $ 545  
Change in cumulative translation adjustment before reclassifications (25) (234)  
Income taxes 0 0  
Net current period other comprehensive loss (25) (234)  
Ending accumulated foreign currency translation 237 311  
Changes in retirement plans      
Beginning accumulated retirement plans benefit cost (230) (1,980)  
Amortization of net actuarial loss 0 33  
Income taxes 0 0  
Net current period other comprehensive income 0 33  
Ending accumulated retirement plans benefit cost (230) (1,947)  
Accumulated other comprehensive income (loss), net of taxes $ 7 $ (1,636) $ 32