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Segment and Geographic Information - Schedule of Revenue by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenue recognized	$ 176,319	$ 256,577	$ 212,958
Europe [Member]
Segment Reporting Information [Line Items]
Revenue recognized	67,161	132,400	112,916
Japan [Member]
Segment Reporting Information [Line Items]
Revenue recognized	36,660	122,475	100,002
China [Member]
Segment Reporting Information [Line Items]
Revenue recognized	72,498	1,700	0
All other [Member]
Segment Reporting Information [Line Items]
Revenue recognized	$ 0	$ 2	$ 40

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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