INCOME TAXES AND TAX CREDIT TRANSACTIONS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Accruals for tax uncertainties	$ 0	$ 0
Deferred income tax expense (benefit)	0	100,000	$ 300,000
Current income tax expense (benefit)	$ (200,000)	$ (100,000)	$ 100,000