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CREDIT FACILITIES - Contractual Principal Payments (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Debt Instrument [Line Items]    
2017 $ 1,449  
2018 1,136  
2019 [1] 1,094  
2020 14,061  
Long-term Debt, Gross 17,740 $ 15,285
Long-term debt 17,451 15,010
Revolving Credit Facility    
Debt Instrument [Line Items]    
Long-term Debt, Gross 12,996 $ 8,769
Long-term debt $ 13,000  
[1] Includes Revolver balance of $13.0 million at September 30, 2018, maturing on May 5, 2022.