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NOTES PAYABLE AND LONG-TERM DEBT (Details)
shares in Millions
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Aug. 20, 2018
Sep. 18, 2015
USD ($)
shares
Jun. 30, 2020
USD ($)
Mar. 31, 2019
USD ($)
Jun. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Debt Instruments [Abstract]                
Proceeds from issuance of long-term debt           $ 410,000 $ 0  
Long-term Debt [Abstract]                
Total           428,000   $ 0
Line of Credit [Member]                
Long-term Debt [Abstract]                
Less current maturities           0   0
Total           $ 428,000   0
BOKF Promissory Note Agreement, Working Capital [Member]                
Debt Instruments [Abstract]                
Proceeds from issuance of long-term debt         $ 0     0
Line of credit facility maximum borrowing capacity   $ 6,000,000            
Debt instrument interest rate increase (decrease) (0.35%)              
Line of credit maturity date           Sep. 18, 2021    
BOKF Promissory Note Agreement, Working Capital [Member] | Minimum [Member]                
Debt Instruments [Abstract]                
Debt instrument covenants fixed charge coverage ratio   1.2            
BOKF Promissory Note Agreement, Working Capital [Member] | Maximum [Member]                
Debt Instruments [Abstract]                
Debt instrument covenants EBITDA ratio   1.5            
BOKF Promissory Note Agreement, Stock Repurchase [Member]                
Debt Instruments [Abstract]                
Line of credit facility maximum borrowing capacity   $ 10,000,000       $ 15,000,000    
Debt instrument interest rate increase (decrease) (0.35%)              
Line of credit maturity date           Sep. 18, 2024    
Line of credit facility term of principal balance rolled           4 years    
Repayments of lines of credit       $ 9,000,000        
Pre-payment penalties       $ 0        
BOKF Promissory Note Agreement, Stock Repurchase [Member] | Maximum [Member]                
Debt Instruments [Abstract]                
Stock repurchase program number of shares authorized to be repurchased (in shares) | shares   2.2            
Institute of Official Credit Guarantee for Small and Medium-sized Enterprises [Member]                
Debt Instruments [Abstract]                
Proceeds from issuance of long-term debt     $ 400,000          
Line of credit maturity date           Jun. 04, 2025    
Debt instrument, term           5 years    
Fixed Interest rate     1.50%   1.50% 1.50%    
Period required to make monthly interest payments           2 years    
Institute of Official Credit Guarantee for Small and Medium-sized Enterprises [Member] | Line of Credit [Member]                
Long-term Debt [Abstract]                
Line of credit note           $ 428,000   $ 0