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REVENUE FROM CONTRACTS WITH CUSTOMERS - NARRATIVE (Details) - USD ($)
$ in Thousands
6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Sep. 30, 2022
Disaggregation of Revenue [Line Items]      
Contract with customer, liability, current $ 613   $ 1,087
Contract with customer, liability, revenue recognized $ 969 $ 308  
Percentage anticipated to be recognized in next 12 months 85.00%    
Revenue, remaining performance obligation (backlog) $ 4,292    
Capitalized contract cost net, preconstruction $ 619   $ 689
Minimum      
Disaggregation of Revenue [Line Items]      
Contract receivable retainage percentage 5.00%    
Maximum      
Disaggregation of Revenue [Line Items]      
Contract receivable retainage percentage 10.00%