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Stock Options (Tables) | 12 Months Ended
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Dec. 31, 2024
Stock Options |
Summary of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Option |  | Weighted-Average | ​ | Weighted-Average
​ | ​ | Number of | ​ | Exercise | ​ | Remaining
​ |  | Shares |  | Price Per Share |  | Contractual Term
Options outstanding at January 1, 2023 |  | 4,851,666 | ​ | $ | 1.91 | ​ | ​ | 8.4
Granted |  | 113,500 | ​ | $ | 2.19 | ​ | ​ | —
Exercised |  | — | ​ | ​ | — | ​ | ​ | —
Canceled |  | (60,900) | ​ | $ | 0.78 | ​ | ​ | —
Options outstanding at December 31, 2023 |  | 4,904,266 | ​ | $ | 1.93 | ​ | ​ | 7.5
Granted | ​ | 973,000 | ​ | $ | 2.09 | ​ | ​ | —
Exercised | ​ | — | ​ | ​ | — | ​ | ​ | —
Canceled | ​ | (886,439) | ​ | $ | 3.36 | ​ | ​ | —
Options outstanding at December 31, 2024 | ​ | 4,990,827 | ​ | $ | 1.71 | ​ | ​ | 7.0
Options exercisable at December 31, 2024 |  | 2,894,417 | ​ | $ | 1.58 | ​ | ​ | 5.8
Summery of Stock-based compensation included in research and development, marketing and advertising, and general and administrative expenses | Stock-based compensation included in research and development, marketing and advertising, and general and administrative expenses was as follows for the years ended December 31, 2024 and 2023 (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023
Research and development | ​ | $ | 701 | ​ | $ | 847
Marketing and advertising | ​ |  | 12 | ​ |  | 18
General and administrative | ​ |  | 460 | ​ |  | 694
Total stock-based compensation expense | ​ | $ | 1,173 | ​ | $ | 1,559
Schedule of grant date fair value black scholes valuation assumptions | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 |
Expected term |  | 6.83 | years | 6.72 | years
Volatility |  | 26.31 | % | 26.05 | %
Dividend rate |  | 0.0 | % | 0.0 | %
Discount rate |  | 4.32 | % | 3.56 | %
​

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + 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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + 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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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