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STOCKHOLDERS' EQUITY (Tables)

6 Months Ended

Jun. 30, 2025

STOCKHOLDERS' EQUITY

Schedule of Stock option activity

​

​	​	​	​	​	​	​	​	​
​		​				Weighted		​
​	​	​	​	Weighted	​	average	​	​
​	​	​	​	average	​	remaining	​	Aggregate
​	​	​	​	exercise	​	contractual	​	Intrinsic
​	​	Number of	​	price	​	life	​	value
​	​	options	​	$	​	Years	​	$
Options outstanding at beginning of period		10,222,749	​	2.78	​	8.55	​	9
Options granted		1,360,950	​	0.77	​	—	​	—
Options exercised		-	​	—	​	—	​	—
Options expired		(797,216)	​	5.14	​	—	​	—
Options forfeited		(1,227,965)	​	1.50	​	—	​	—
​	​	​	​	​	​	​	​	​
Options outstanding at end of period		9,558,518	​	2.46	​	8.38	​	5
​	​	​	​	​	​	​	​	​
Options vested and expected to vest at end of period		7,484,313	​	2.50	​	8.31	​	3
​	​	​	​	​	​	​	​	​
Exercisable at end of period		3,935,650	​	4.29	​	7.19	​	4

Schedule of Restricted Stock option activity

​

​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	Number of
​	​	​	​	​	​	​	​	Restricted shares
​	​	​	​	​	​	​	​	​
Restricted shares outstanding at beginning of year		​	​	​	​	​	​	5,408,404
Restricted shares granted		​	​	​	​	​	​	1,525,300
Restricted shares forfeited		​	​	​	​	​	​	(66,504)
​	​	​	​	​	​	​	​	​
Restricted shares outstanding at end of period		​	​	​	​	​	​	6,867,200

Schedule of assumptions used to estimate the fair values of the options granted to employees, directors and non-employees

​

​	​	​	​	​	​
​	​	Six months ended
​	​	June 30,
​		2025	​	2024
Volatility		96.72-102.19	%	94.75-97.97	%
Risk-free interest rate		4.08-4.23	%	3.85-4.72	%
Dividend yield		—	%	—	%
Expected life (years)		5.00-5.87	​	5.00-5.87	​

Schedule of Compensation cost

​

​	​	​	​	​	​	​
​	​	Three months ended
​	​	June 30,
​		2025			2024
Cost of revenues	​	$	6	​	$	5
Research and development	​		441	​		448
Sales and marketing	​		583	​		1,650
General and administrative	​		1,005	​		1,459
​	​	​	​	​	​	​
Total stock-based compensation expenses	​	$	2,035	​	$	3,562

​

​

​	​	​	​	​	​	​
​	​	Six months ended
​	​	June 30,
​		2025			2024
Cost of revenues	​	$	16	​	$	12
Research and development	​		966	​		1,563
Sales and marketing	​		1,398	​		3,406
General and administrative	​		1,997	​		5,439
​	​	​	​	​	​	​
Total stock-based compensation expenses	​	$	4,377	​	$	10,420

​

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Tabular disclosure of the changes in outstanding nonvested restricted stock shares.

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Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

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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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