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NOTES PAYABLE - Narrative (Details)
1 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]      
Loss on extinguishment of debt   $ 2,808,000 $ (479,000)
Long-term line of credit $ 0 0 0
Remaining borrowing capacity 10,000,000 10,000,000 $ 5,000,000
Medium-term Notes | Third Restated Credit Agreement | Revolving Credit Facility      
Debt Instrument [Line Items]      
Maximum borrowing capacity 20,000,000 20,000,000  
Revolving Credit Facility | Third Restated Credit Agreement | Revolving Credit Facility      
Debt Instrument [Line Items]      
Maximum borrowing capacity 10,000,000 $ 10,000,000  
Periodic Payment One      
Debt Instrument [Line Items]      
Periodic payment 125,000    
Periodic Payment Two      
Debt Instrument [Line Items]      
Periodic payment 250,000    
Debt Instrument Covenant, Period One | Revolving Credit Facility | Third Restated Credit Agreement      
Debt Instrument [Line Items]      
EBITDA $ 3,750,000    
Leverage ratio 3.50    
Fixed charge coverage ratio 1.00    
Debt Instrument Covenant, Period Two | Revolving Credit Facility | Third Restated Credit Agreement      
Debt Instrument [Line Items]      
EBITDA $ 4,850,000    
Leverage ratio 3.25    
Fixed charge coverage ratio 1.50    
Debt Instrument Covenant, Period Three | Revolving Credit Facility | Third Restated Credit Agreement      
Debt Instrument [Line Items]      
EBITDA $ 5,950,000    
Leverage ratio 2.50    
Fixed charge coverage ratio 1.60    
Debt Instrument Covenant, Period Four | Revolving Credit Facility | Third Restated Credit Agreement      
Debt Instrument [Line Items]      
Fixed charge coverage ratio 2.00