XML 39 R28.htm IDEA: XBRL DOCUMENT
v3.25.2

STOCK BASED COMPENSATION (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
STOCK BASED COMPENSATION |
Summary of stock-based activities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted |  | Weighted
​ | ​ | ​ | ​ | Average | ​ | Average
​ | ​ | ADS Underlying | ​ | Exercise | ​ | Contractual
​ | ​ | Options | ​ | Price | ​ | Terms
Outstanding at December 31, 2024 |  | 55,541 | ​ | $ | 150.47 |  | 9.76
Granted |  | 124,514 | ​ | ​ | 9.07 |  | ​
Canceled |  | — | ​ | ​ | — |  | ​
Outstanding at June 30, 2025 |  | 180,055 | ​ | $ | 52.69 |  | 9.30
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable options at June 30, 2025 |  | 2,043 | ​ | $ | 2,576.66 |  | 7.88
Summary of weighted average assumptions of stock options granted valued using the Black-Scholes option-pricing model | ​
​ | ​ | ​ | ​ | ​
​ |  | June 30, |
​ | ​ | 2025 |
Expected volatility |  | ​ | 108.4 | %
Risk-free interest rate |  | ​ | 4.4 | %
Expected dividend yield |  | ​ | 0.0 | %
Expected life of options in years |  | ​ | 6.4 | ​
Exercise Price | ​ | $ | 9.07 | ​
Fair value of common stock | ​ | $ | 9.07 | ​
Estimate fair value of option | ​ | $ | 7.73 | ​

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration