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STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2021

STOCK-BASED COMPENSATION

Summary of the Company's stock option activity

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​	​	​	​	​	​	​	​	​	​	​
​		​		​	​	​	​	​		Weighted Average
​	​	​	​	​	​	​	​	​	​	Remaining
​	​	​	​	Weighted Average		​	Total Intrinsic		​	Contractual
​		Number of Shares		Exercise Price			Value			Life (in years)
Outstanding as of January 1, 2021		6,001,814	​	$	6.22	​	$	—	​	8.3
Granted		1,620,000	​	​	3.06	​	​	—	​	9.3
Exercised	​	(1,456)	​	​	2.12	​	​	—	​	—
Canceled/Expired		(159,581)	​	​	3.42	​	​	—	​	—
Outstanding as of June 30, 2021		7,460,777	​	$	5.59	​	$	1,178,000	​	8.1
Options vested and exercisable		3,396,723	​	$	6.91	​	$	299,000	​	7.5

Schedule or Description of Weighted Average Discount Rate

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​	​	​	​	​
​	​	For the Six Months Ended		​
​		June 30, 2021
Exercise price	​	$	3.06	​
Expected term (years)	​		6.0	​
Expected stock price volatility	​		95	%
Risk-free rate of interest	​		1	%
Expected dividend rate	​		0	%

Schedule of stock-based compensation expenses

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For the Three Months Ended

For the Six Months Ended

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June 30,

June 30,

​

2021

2020

2021

2020

Stock Compensation expenses:

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Research and development

​

$

709,000

​

$

528,000

​

$

1,405,000

​

$

1,309,000

General and administrative

​

943,000

​

833,000

​

1,624,000

​

1,396,000

Total stock compensation expenses

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$

1,652,000

​

$

1,361,000

​

$

3,029,000

​

$

2,705,000

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Tabular disclosure of stock based compensation expenses recorded.

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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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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