SUPPLEMENTAL BALANCE SHEET INFORMATION - Deferred Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred charges
Initial franchise fees	$ 7,034	$ 6,795
Less - accumulated amortization	(2,687)	(2,366)
Deferred Costs, Net	4,347	4,429
Amortization expense	$ 500	$ 500	$ 400