REVENUE RECOGNITION, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Contract with Customer, Asset and Liability [Abstract]
Total Deferred Revenue	$ 1,514	$ 1,450
Tariff Revenue [Member]
Contract with Customer, Asset and Liability [Abstract]
Contract Assets	2,144	2,175
Total Deferred Revenue	1,227	1,150
Tariff Deferred Revenue	1,200
Non-Tariff Revenue [Member]
Contract with Customer, Asset and Liability [Abstract]
Total Deferred Revenue	287	$ 300
Tariff Deferred Revenue	$ 300