NOTES PAYABLE AND LONG-TERM DEBT (Short-Term Debt) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Short-term notes payable and current portion of long-term debt	$ 500	$ 500
Notes Payable to Banks | Unsecured Debt
Short-term Debt [Line Items]
Interest rate description	WSJ
Basis spread on variable rate	0.50%
Floor	4.75%
Short-term notes payable and current portion of long-term debt	$ 500	$ 500