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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2025
STOCK-BASED COMPENSATION |
Schedule of weighted-average assumptions used in Black-Scholes option pricing model | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  |  | Six Months Ended June 30, | ​
​ |  | ​ | 2025 |
Risk-free interest rate | ​ | ​ |  | 4.44 | %
Expected volatility | ​ | ​ |  | 125.37 | %
Expected term (years) | ​ | ​ |  | 5.38 | ​
Expected dividend yield | ​ | ​ | ​ | 0.00 | %
Fair value, per share | ​ | ​ | $ | 476.10 | ​
Schedule of stock-based compensation expense | Total stock-based compensation expense was as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ | Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ | ​ | 2025 | ​ | 2024 | ​ | 2025 | ​ | 2024
Cost of sales | ​ | $ | 1 | ​ | $ | 5 | ​ | $ | 7 | ​ | $ | 9
Selling, general and administrative | ​ |  | 345 | ​ |  | 298 | ​ | ​ | 853 | ​ | ​ | 628
Research and development | ​ | ​ | 64 | ​ | ​ | 64 | ​ | ​ | 171 | ​ | ​ | 130
Total stock-based compensation expense | ​ | $ | 410 | ​ | $ | 367 | ​ | $ | 1,031 | ​ | $ | 767

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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 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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