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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-Based Compensation |
Schedule of weighted-average assumptions used in determining fair value of share based awards | The Company determines the fair value of share-based awards at the grant date by using the Black-Scholes option-pricing model, and has utilized the “simplified” method, as prescribed by the SEC’s Staff Accounting Bulletin (“SAB”) No.110, Share-Based Payment, to compute expected lives of share based awards with the following weighted-average assumptions: ​
​ | ​ | ​ | ​ | ​ | ​
Years ended |  | ​ |  | ​ | ​
December 31, | ​ | 2022 | ​ | 2021 | ​
Assumptions |  |  |  |  |
Dividend yield |  | 0 | % | 0 | %
Risk free interest rate |  | 1.84%-4.27 | % | 0.29%-0.85 | %
Expected volatility |  | 91%-94 | % | 90%-101 | %
Expected lives |  | 1.5-2.75 years |  | 2.5-5 years |
​
Schedule of company's stock option plan | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted
​ | ​ | ​ | ​ | Average
Stock Options and Stock Appreciation Rights | ​ | Shares | ​ | Exercise Price
Outstanding at December 31, 2020 |  | 5,329,515 | ​ | $ | 1.06
-Cancelled |  | (133,257) | ​ | $ | 2.02
-Exercised |  | (3,076,489) | ​ | $ | 1.16
-Granted (1) |  | 484,254 | ​ | $ | 1.82
Outstanding at December 31, 2021 |  | 2,604,023 | ​ | $ | 1.03
-Cancelled |  | (11,781) | ​ | $ | 3.75
-Exercised |  | (583,273) | ​ | $ | 1.15
-Granted (2) |  | 381,181 | ​ | $ | 4.33
Outstanding at December 31, 2022 |  | 2,390,150 | ​ | $ | 1.51
​ (1)Options to purchase 463,754 shares were granted in 2021, all of which were vested immediately in 2021. In addition, 20,500 stock appreciation rights were granted in December 2021 with a six- month vesting period. (2)Options to purchase 381,181 shares were granted in 2022, of which options to purchase 40,588 shares vested immediately in 2022 and the remainder vested 50% immediately and 50% one year after the date of the grants.
Schedule of weighted average contractual life in years and the weighted average exercise price | The following is the weighted average contractual life in years and the weighted average exercise price at December 31, 2022 and 2021 of: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Remaining | ​ | Weighted
​ | ​ | Number of | ​ | Contractual | ​ | Average
December 31, 2022 | ​ | Options | ​ | Life | ​ | Exercise Price
Options outstanding and vested |  | 2,218,799 |  | 5.39 | ​ | $ | 1.33
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Remaining | ​ | Weighted
​ | ​ | Number of | ​ | Contractual | ​ | Average
December 31, 2021 | ​ | Options | ​ | Life | ​ | Exercise Price
Options outstanding and vested |  | 2,583,523 |  | 5.85 | ​ | $ | 1.00
​
Schedule of intrinsic value | The intrinsic values of options vested and exercised during the years ended December 31, 2022 and 2021 were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
Intrinsic value of options vested | ​ | $ | 1,249,506 | ​ | $ | 1,481,858
Intrinsic value of options exercised | ​ | $ | 4,051,422 | ​ | $ | 7,088,578

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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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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