INCOME TAXES, Other Tax Information (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) Partnership	Dec. 31, 2019 USD ($) Partnership	Dec. 31, 2018 USD ($)
Other Tax Information [Abstract]
Minimum percentages of tax position liable to be realized upon ultimate settlement	50.00%
Liability for uncertain tax positions	$ 0
Unrecognized tax benefits	$ 0
Number of investments in partnerships | Partnership	4	4
Investment amount in partnerships	$ 216,000	$ 325,000
Tax Credit Carryforward [Abstract]
Investment tax credits	282,000
Amortization of investments in other expenses	$ 108,000	108,000	$ 108,000
Investment Tax Credit Carryforward [Member]
Tax Credit Carryforward [Abstract]
Tax credits recognition period	2 years
Tax credits recognized as reduction of tax expense amount	$ 141,000	$ 141,000	$ 141,000