GOODWILL AND ACQUIRED INTANGIBLES - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 159,429,000		$ 159,429,000		$ 277,202,000
Impairment of goodwill and intangible assets	131,595,000	$ 0	131,595,000	$ 0
Intangible asset impairment			13,748,000
Amortization expense	2,800,000	$ 3,400,000	10,300,000	$ 8,400,000
Developed technology
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment	13,700,000		13,748,000		$ 449,000
Bridg Acquisition
Finite-Lived Intangible Assets [Line Items]
Goodwill	0		0
Impairment of goodwill and intangible assets			117,800,000
United Kingdom
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 0		$ 0