Segment, Concentration and Geographical Information - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenues		$ 20,555	$ 40,862
Less:
Stock-based compensation expense		4,503	4,835
Depreciation		15	50
Goodwill impairment	$ 24,000	23,989	0
Loss before provision for income tax (benefit) provision		(48,710)	(24,238)
(Benefit) provision for income tax expense		(13)	158
Net loss		(48,697)	(24,396)
Reportable Segment
Segment Reporting Information [Line Items]
Revenues		20,555	40,862
Less:
Adjusted cost of revenues		6,100	10,326
Adjusted selling and marketing		7,496	10,041
Adjusted research and development		12,687	15,618
Adjusted general and administrative		8,072	9,593
Adjusted operating loss		(13,800)	(4,716)
Other segment expenses		(798)	(1,110)
Stock-based compensation expense		(4,503)	(4,834)
Depreciation		(365)	(606)
Amortization		(5,935)	(6,789)
Goodwill impairment		(23,989)	0
Other Income (expenses)		680	(6,183)
Loss before provision for income tax (benefit) provision		(48,710)	(24,238)
(Benefit) provision for income tax expense		(13)	158
Net loss		$ (48,697)	$ (24,396)