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Share-based compensation (Tables) | 6 Months Ended
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Jun. 30, 2021
Share-based compensation |
Schedule of company's stock option plan | A summary of the activity for stock options issued under the Company’s Plans for the indicated periods is presented below: ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Exercise
Stock Option Plan Totals | ​ | Shares | ​ | Price
Outstanding at December 31, 2019 |  | 7,042,377 | ​ | $ | 1.01
-Cancelled | ​ | — | ​ | $ | —
-Exercised | ​ | (1,967,562) | ​ | $ | 0.91
-Granted | ​ | 254,700 | ​ | $ | 1.11
Outstanding at December 31, 2020 |  | 5,329,515 | ​ | $ | 1.06
-Cancelled | ​ | (91,000) | ​ | ​ | 2.18
-Exercised | ​ | (1,073,571) | ​ | $ | 1.25
-Granted | ​ | 415,478 | ​ | $ | 1.60
Outstanding at June 30, 2021, unaudited |  | 4,580,422 | ​ | $ | 1.04
Schedule of weighted average contractual life and exercise price | The following is the weighted average contractual life in years and the weighted average exercise price at June 30, 2021 of: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Weighted
​ | ​ | ​ | ​ | Remaining | ​ | Average
​ |  | Number of |  | Contractual |  | Exercise
​ | ​ | Options | ​ | Life | ​ | Price
Options outstanding and vested |  | 4,512,854 |  | 3.9 | years | $ | 1.03

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + 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 (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: 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 + Details
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