FEDERAL AND STATE INCOME TAXES - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
FEDERAL AND STATE INCOME TAXES
Income tax expense (benefit) at statutory federal rate	$ 1,461	$ (1,019)
Federal income tax effects of:
State income tax benefit	(44)	(36)
Per diem and other nondeductible meals and entertainment	378	388
Taxes related to prior years	346	0
Non-deductible compensation	219	271
Loss carryback rate benefit	(628)	0
Other	(87)	(46)
Federal income tax expense (benefit)	1,645	(442)
State income tax expense	564	286
Total income tax expense (benefit)	$ 2,209	$ (156)
Effective income tax rate reconciliation percent	31.80%	3.20%