SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings per share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings per share
Common Stock underlying issued and outstanding stock options	15,040	65,597	141,435
Common stock issuable upon the conversion of convertible preferred shares			232,445
Diluted EPS calculated under the treasury stock method	15,040	65,597	373,880
Net Income	$ (7,011,036)	$ 5,078,557	$ 56,064,241
Preferred stock dividend requirements	(231,946)	(232,444)	(241,703)
Income applicable to common shareholders	$ (7,242,982)	$ 4,846,113	$ 55,822,538
Average common shares outstanding	29,937,159	32,896,348	33,870,819
Average common and common equivalent shares outstanding - assuming dilution	29,937,159	32,961,945	34,244,699
Basic earnings per share	$ (0.24)	$ 0.15	$ 1.65
Diluted earnings per share	$ (0.24)	$ 0.15	$ 1.63