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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Future amortization expense (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Finite-Lived Intangible Assets      
2020 $ 373    
2021 373    
2022 363    
2023 326    
2024 326    
Thereafter 1,112    
Totals 2,873 $ 3,318 $ 0
Trademarks [Member]      
Finite-Lived Intangible Assets      
2020 78    
2021 78    
2022 78    
2023 78    
2024 78    
Thereafter 682    
Totals 1,072 1,150 0
Client Relationships [Member]      
Finite-Lived Intangible Assets      
2020 248    
2021 248    
2022 248    
2023 248    
2024 248    
Thereafter 430    
Totals 1,670 1,918 0
Noncompete Agreements [Member]      
Finite-Lived Intangible Assets      
2020 47    
2021 47    
2022 37    
2023 0    
2024 0    
Thereafter 0    
Totals 131 178 0
Backlog [Member]      
Finite-Lived Intangible Assets      
2020 0    
2021 0    
2022 0    
2023 0    
2024 0    
Thereafter 0    
Totals $ 0 $ 72 $ 0