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GENERAL CREDIT AGREEMENT (Narrative) (Details)
9 Months Ended
Sep. 30, 2020
USD ($)
Short-term Debt [Line Items]  
Borrowings under credit line $ 0
Revolving Credit Facility  
Short-term Debt [Line Items]  
Credit line maximum borrowing amount 6,000,000
Letter of Credit  
Short-term Debt [Line Items]  
Credit line maximum borrowing amount 2,000,000
Credit line maximum amount outstanding during period 4,750,000
Line of Credit, Current $ 1,250,000