SHARE-BASED COMPENSATION - Summary of Stock Option Activity (Details) - Stock options - USD ($)	6 Months Ended
	Jun. 30, 2024
SHARE-BASED COMPENSATION
Number of Shares under Option, Outstanding, Beginning balance	1,270,000
Number of Shares under Option, Granted	0
Number of Shares under Option, Forfeited and Expired	(12,000)
Number of Shares under Option, Outstanding, Ending balance	1,258,000
Number of Shares under Option, Exercisable	1,237,000
Number of Shares under Option, Vested and expected to vest	1,258,000
Weighted-average Exercise Price per Option, Outstanding, Beginning balance	$ 3.90
Weighted-average Exercise Price per Option, Forfeited and Expired	11.48
Weighted-average Exercise Price per Option, Outstanding, Ending balance	3.82
Weighted-average Exercise Price per Option, Exercisable	3.85
Weighted-average Exercise Price per Option, Vested and expected to vest	$ 3.82
Weighted-average Remaining Contractual Life, Outstanding	5 years 9 months 18 days
Weighted-average Remaining Contractual Life, Exercisable	5 years 8 months 12 days
Weighted-average Remaining Contractual Life, Vested and expected to vest	5 years 9 months 18 days
Aggregate average Intrinsic Value, Outstanding	$ 5,100
Aggregate average Intrinsic Value, Exercisable	5,100
Aggregate average Intrinsic Value, Vested and expected to vest	$ 5,100