EQUITY AWARDS - Schedule of Nonvested Stock Option Activity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Number of Shares
Outstanding at beginning of year (in shares)	214,680	251,120
Effect of 10% stock dividend (in shares)	23,218
Granted (in shares)	24,500	23,000
Vested (in shares)	(12,100)	(8,200)
Forfeited (in shares)	0	(23,200)
Balance (in shares)	250,298	242,720
Weighted-Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 4.46	$ 4.97
Granted (in USD per share)	5.67	5.62
Vested (in USD per share)	(4.59)	(5.18)
Forfeited (in USD per share)	0	(1.93)
Balance (in USD per share)	$ 5.11	$ 5.90