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LONG-TERM DEBT (Details) - USD ($)
12 Months Ended
Feb. 20, 2019
Dec. 31, 2020
Dec. 31, 2021
Debt Instrument [Line Items]      
Debt issuance costs   $ 156,000 $ 107,000
Revolving Credit Facility | Credit Agreement      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 40,000,000    
Accordion feature, increase limit 35,000,000    
Average quarterly loan balance threshold $ 32,000,000    
Commitment fee percentage 0.20%    
Fronting fee percentage 0.125%    
Proceeds from long-term lines of credit   14,000,000  
Long-term line of credit   $ 0 $ 0
Revolving Credit Facility | Credit Agreement | London Interbank Offered Rate (LIBOR)      
Debt Instrument [Line Items]      
Basis spread on variable rate 2.50%    
Revolving Credit Facility | Credit Agreement | Specified Spread | Minimum      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.25%    
Revolving Credit Facility | Credit Agreement | Specified Spread | Maximum      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.50%