SEGMENT REPORTING - Segment Reporting Information, by Segment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	1
Segment Reporting Information [Line Items]
Revenue	$ 602,463	$ 1,072,054	$ 1,598,577
Cost of sales	157,840	296,204	458,163
Equity compensation	7,363	8,188	11,053
Other (income) expense	(909)	(2,395)	747
Provision for income taxes	1,696	29,382	40,491
Net income	2,091	99,415	143,568
Optavia Segment | Operating segments
Segment Reporting Information [Line Items]
Revenue	602,463	1,072,054	1,598,577
Cost of sales	157,840	296,204	458,163
Selling, marketing, and after sales support	304,481	501,188	766,331
Distribution	37,710	40,534	61,899
Technology	49,939	56,595	54,736
Administrative and corporate support functions	42,252	42,943	61,589
Equity compensation	7,363	8,188	11,053
Other (income) expense	(909)	(2,395)	747
Provision for income taxes	1,696	29,382	40,491
Net income	2,091	99,415	143,568
Optavia Segment | Adjustments and reconciling items
Segment Reporting Information [Line Items]
Net income	$ 0	$ 0	$ 0