INCOME TAXES - Reconciliation of the statutory tax rate with effective tax rate (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
INCOME TAXES
Federal statutory tax rate	21.00%	21.00%	21.00%
Foreign rate differential	(5.60%)	4.10%	(1.40%)
State income tax, net of federal benefit	14.00%	14.00%	(3.30%)
Uncertain tax positions	101.70%	2.10%	(0.30%)
Change in valuation allowance	(30.90%)		23.80%
GILTI (FDII)	(3.70%)	(4.00%)	0.80%
Meals and entertainment	(3.10%)	0.70%	(0.20%)
Foreign expenses not deductible for tax	(3.70%)	3.20%	(0.80%)
Transaction costs not deductible for tax		18.80%	(0.20%)
Other non-deductible expense	(6.80%)
Nondeductible stock compensation	(24.10%)	67.30%	(48.00%)
Stock compensation shortfall (windfall)	(1.50%)	1.20%
Other compensation	(4.60%)		(0.90%)
Canadian branch income	1.30%	8.80%	(9.10%)
Foreign tax restructuring	21.30%
Other permanent items	0.90%	4.30%	2.10%
Total	76.20%	141.50%	(16.50%)