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Long-Term Investments (Tables)

12 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Long-Term Investments

As of December 31, 2020 and 2021, the Company held equity investments in several privately-held companies with the carrying value as follows:

		Percentage of Ownership								December 31
		2020				2021				2020				2021
										US$				US$
Equity securities measured at cost:
Cashido Corp. (Cashido)			0.6	%			0.6	%			—				—
Vastview Technology, Corp. (Vastview)			2.9	%			2.9	%			—				—
Deep Vision, Inc (Deep Vision)			16.2	%			14.4	%			5,000				6,500
BIWIN Storage Technology Corp.(BIWIN)			—				0.3	%			—				2,041
											5,000				8,541

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