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Refund Liabilities

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Refund Liabilities

12. REFUND LIABILITIES

		December 31
		2019				2020
		US$				US$
Refund liabilities			2,260				2,105

Estimated sales returns and other allowances are made and adjusted based on historical experience and the consideration of varying contractual terms.

The changes in the refund liabilities are summarized as follows:

		Year Ended December 31
		2019				2020
		US$				US$
Refund liabilities
Balance, beginning of year			2,093				2,260
Additions			5,076				10,576
Actual sales return and discount			(4,909	)			(10,731	)
Balance, end of year			2,260				2,105

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