Segment, Product and Geographic Information - Revenues from significant customers (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
Driver IC Segment
Segment, Product and Geographic Information
Revenues	238,158	281,421	337,300
Driver IC Segment \| Customer A and Its affiliates
Segment, Product and Geographic Information
Revenues	176,457	207,725	234,581
Driver IC Segment \| Customer C
Segment, Product and Geographic Information
Revenues	61,701	73,696	102,719
Non-driver Products Segment
Segment, Product and Geographic Information
Revenues	26,702	33,144	37,890
Non-driver Products Segment \| Customer A and Its affiliates
Segment, Product and Geographic Information
Revenues	23,648	31,276	36,770
Non-driver Products Segment \| Customer C
Segment, Product and Geographic Information
Revenues	$ 3,054	$ 1,868	$ 1,120

- References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/exampleRef
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Reference 11: http://www.xbrl.org/2003/role/exampleRef
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+ Details