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Segment and Geographic Information - Revenue by Location and Product Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023
Revenues from External Customers and Long-Lived Assets
Revenue	$ 180,633	$ 208,476
Power discrete
Revenues from External Customers and Long-Lived Assets
Revenue	121,500	144,573
Power IC
Revenues from External Customers and Long-Lived Assets
Revenue	52,747	62,320
Packaging and testing services
Revenues from External Customers and Long-Lived Assets
Revenue	745	1,583
License and development services
Revenues from External Customers and Long-Lived Assets
Revenue	5,641	0	$ 15,600
Hong Kong
Revenues from External Customers and Long-Lived Assets
Revenue	141,206	172,296
China
Revenues from External Customers and Long-Lived Assets
Revenue	26,619	28,014
South Korea
Revenues from External Customers and Long-Lived Assets
Revenue	5,311	2,897
United States
Revenues from External Customers and Long-Lived Assets
Revenue	1,395	4,484
Other countries
Revenues from External Customers and Long-Lived Assets
Revenue	$ 6,102	$ 785

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
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-Section 50
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Section 50
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Section 50
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-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-4

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