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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	​

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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.

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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.

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