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Segment, Geographic and Customer Information - Schedule of Revenue by Country (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 44,496	$ 21,473	$ 80,038	$ 43,215
Revenue from Contract with Customer Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Revenue	44,496	21,473	80,038	43,215
Taiwan | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Revenue	12,009	8,143	28,501	17,973
Hong Kong | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Revenue	17,557	5,878	28,991	10,321
United States | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Revenue	2,808	1,873	4,042	3,675
Other | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Revenue	$ 12,122	$ 5,579	$ 18,504	$ 11,246

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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.

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