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DEBT (Details)
Sep. 30, 2021
USD ($)
item
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2020
USD ($)
DEBT        
Restricted CDARS account $ 5,000,000     $ 5,000,000
Finance lease $ 53,000      
Dominion Loan Agreement        
DEBT        
Maturity of line of credit extended 1 year      
Maximum borrowing capacity   $ 15,000,000 $ 15,000,000  
Percentage of maximum borrowing capacity on eligible accounts receivable   80.00%    
Percentage of maximum borrowing capacity on deposit with lender   100.00%    
Restricted CDARS account   $ 5,000,000    
Commitment fee (as a percent)     0.10%  
Minimum tangible net worth     $ 55,000,000  
Dominion Loan Agreement | Minimum        
DEBT        
Interest rate (as a percent)     3.50%  
Dominion Loan Agreement | Maximum        
DEBT        
Interest rate (as a percent)     6.00%  
Dominion Letters of Credit        
DEBT        
Number of letters of credit | item 1      
Amount of letter of credit $ 265,000      
Notes payable to finance companies for insurance        
DEBT        
Interest rate (as a percent) 4.99%     4.99%
Number of notes payable | item 1      
Aggregate principal amount outstanding $ 203,000     $ 40,000
Notes payable to finance companies for insurance | Minimum        
DEBT        
Interest rate (as a percent)       4.99%