STOCKHOLDERS' EQUITY - Restricted stock grants (Details) - Restricted stock awards [Member] - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
STOCKHOLDERS' EQUITY
Shares, Unvested at beginning of year			76,000
Shares, Grants	54,759	62,373	54,759	62,373
Shares, Vested			(82,000)
Shares, Forfeited/cancelled/expired			0
Shares, Unvested at end of year	49,000		49,000
Average Fair Value at Grant Date, Unvested at beginning of year (in dollars per share)			$ 3.90
Average Fair Value at Grant Date, Grants (in dollars per share)			5.39
Average Fair Value at Grant Date, Vested (in dollars per share)			4.51
Average Fair Value at Grant Date, Forfeited/cancelled/expired (in dollars per share)			0
Average Fair Value at Grant Date, Unvested at end of year (in dollars per share)	$ 4.56		$ 4.56