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Stock options (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement, Noncash Expense [Abstract]

Stock option activity

		Year ended December 31,
		2020								2019								2018
		Number of options				Weighted average exercise price				Number of options				Weighted average exercise price				Number of options				Weighted average exercise price
						US$								US$								US$
Outstanding, beginning of year			51,000				2.60				-				-				-				-
Granted			-				-				51,000				2.60				-				-
Outstanding, end of year			51,000				2.60				51,000				2.60				-				-
Exercisable, end of year			-				-				-				-				-				-

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- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- References

No definition available.

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