Segment, Concentration and Geographical Information - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Revenues	$ 4,621	$ 5,798
Less:
Stock-based compensation expense	1,088	1,136
Depreciation	1	6
Goodwill impairment	0	23,989
Loss before provision for income tax provision	(5,177)	(30,968)
Provision for income tax expense	1	39
Net loss	(5,178)	(31,007)
Reportable Segment
Segment Reporting Information [Line Items]
Revenues	4,621	5,798
Less:
Adjusted cost of revenues	1,257	1,982
Adjusted selling and marketing	1,408	2,292
Adjusted research and development	2,642	3,707
Adjusted general and administrative	2,086	2,089
Adjusted operating loss	(2,772)	(4,272)
Other segment expenses	0	(135)
Stock-based compensation expense	(1,088)	(1,136)
Depreciation	(74)	(98)
Amortization	(1,276)	(1,816)
Goodwill impairment	0	(23,989)
Other income (expenses)	33	478
Loss before provision for income tax provision	(5,177)	(30,968)
Provision for income tax expense	1	39
Net loss	$ (5,178)	$ (31,007)