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DEBT (Details) - USD ($)
9 Months Ended
Jun. 30, 2017
Sep. 30, 2016
[1]
Nov. 04, 2014
Debt Instruments [Line Items]      
Long-term debt—revolving credit facility $ 50,500,000 $ 43,500,000  
Statutory Reserve Rate      
Debt Instruments [Line Items]      
Reference rate one-month Eurodollar Rate    
Margin over reference rate 1.00%    
Restated Credit Agreement      
Debt Instruments [Line Items]      
Available credit borrowings     $ 100,000,000
Deferred financing cost     420,000
Outstanding revolving credit borrowings $ 50,500,000    
Weighted-average interest rate 2.42%    
Quarterly fee on the unused balance 0.25%    
Restated Credit Agreement | Eurodollar Rate      
Debt Instruments [Line Items]      
Reference rate Eurodollar Rate    
Interval for payment of accrued interest under option one 1 month    
Interval for payment of accrued interest under option two 2 months    
Interval for payment of accrued interest under option three 3 months    
Restated Credit Agreement | Prime Lending Rate      
Debt Instruments [Line Items]      
Reference rate Prime Lending Rate    
Restated Credit Agreement | Federal Funds Rate      
Debt Instruments [Line Items]      
Reference rate Federal Funds Rate    
Margin over reference rate 0.50%    
Credit Agreement, accordion feature      
Debt Instruments [Line Items]      
Available credit borrowings     $ 130,000,000
[1] The condensed consolidated balance sheet as of September 30, 2016 has been prepared using information from the audited financial statements at that date.