Segment Reporting and Geographical Concentration - Revenues And Property And Equipment By Geographical Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 63,064	$ 59,680
Reportable Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	63,064	59,680
Total property and equipment, net	1,525	865
United States | Reportable Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	23,327	21,934
Total property and equipment, net	1,132	507
China | Reportable Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	12,305	11,010
Total property and equipment, net	10	120
Japan | Reportable Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	6,133	10,796
Total property and equipment, net	103	142
Korea | Reportable Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	7,000	3,106
Taiwan | Reportable Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	6,818	3,847
All other countries | Reportable Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	7,481	8,987
Total property and equipment, net	$ 280	$ 96