STOCKHOLDERS' EQUITY - Restricted stock grants (Details) - Common Stock Class D - Restricted stock awards - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
STOCKHOLDERS' EQUITY
Shares, Unvested at beginning of year	434,264	76,056
Shares, Grants	895,520	1,357,687
Shares, Vested	(1,001,667)	(999,479)
Shares, Forfeited/cancelled/expired	(15,000)
Shares, Unvested at end of year	313,117	434,264
Average Fair Value at Grant Date, Unvested at beginning of year (in dollars per share)	$ 4.27	$ 3.90
Average Fair Value at Grant Date, Grants (in dollars per share)	5.17	4.27
Average Fair Value at Grant Date, Vested (in dollars per share)	4.92	4.25
Average Fair Value at Grant Date, Forfeited/cancelled/expired (in dollars per share)	4.12
Average Fair Value at Grant Date, Unvested at end of year (in dollars per share)	$ 4.77	$ 4.27