v3.26.1
Segment, Product and Geographic Information - Segment revenues from major product lines (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Segment, Product and Geographic Information      
Revenues $ 832,173 $ 906,802 $ 945,428
Display drivers for large-sized applications      
Segment, Product and Geographic Information      
Revenues 90,665 125,936 175,666
Display drivers for small and medium-sized applications      
Segment, Product and Geographic Information      
Revenues 575,132 625,390 629,174
Non-driver products      
Segment, Product and Geographic Information      
Revenues 166,376 155,476 140,588
Driver IC      
Segment, Product and Geographic Information      
Revenues 665,797 751,326 804,840
Driver IC | Display drivers for large-sized applications      
Segment, Product and Geographic Information      
Revenues 90,665 125,936 175,666
Driver IC | Display drivers for small and medium-sized applications      
Segment, Product and Geographic Information      
Revenues 575,132 625,390 629,174
Driver IC | Non-driver products      
Segment, Product and Geographic Information      
Revenues 0 0 0
Non-driver products      
Segment, Product and Geographic Information      
Revenues 166,376 155,476 140,588
Non-driver products | Display drivers for large-sized applications      
Segment, Product and Geographic Information      
Revenues 0 0 0
Non-driver products | Display drivers for small and medium-sized applications      
Segment, Product and Geographic Information      
Revenues 0 0 0
Non-driver products | Non-driver products      
Segment, Product and Geographic Information      
Revenues $ 166,376 $ 155,476 $ 140,588