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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Stock Based Compensation [Abstract]

Schedule of Stock Based Compensation Expense

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Three Months Ended

Six Months Ended

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June 30,

June 30,

​

2023

2022

2023

2022

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General and administrative

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$

243

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$

216

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$

522

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$

469

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Research and development

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116

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$

134

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$

238

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$

262

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Stock-based compensation costs before income taxes

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$

359

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$

350

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$

760

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$

731

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Schedule of Fair Value of the Stock Options Granted

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​	​	Six months ended	​	Six months ended
​		June 30, 2023		June 30, 2022
Expected term (years)		5-6		5-6
Risk free interest rate		3.660%  – 4.050%	​	1.370% – 3.605%
Volatility		89% – 92%	​	87% – 93%
Expected dividend yield over expected term		0.00%	​	0.00%

Schedule of Share Option Activity

A summary of the share option activity and related information is as follows:

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​		​		​	​		Weighted		​	​
​		​		Weighted			Average		​	​
​		Number of		Average			Remaining		Aggregate
​	​	Options		Exercise			Contractual	​	Intrinsic
​	​	Outstanding	​	Price Per Share			Term (Years)	​	Value ($000)
Options outstanding at December 31, 2022		1,610,590	​	$	5.85		8.34	​	$	—
Granted		650,128	​	$	0.59		—	​		—
Cancelled/forfeited		(65,372)	​	$	15.53		—	​		—
Options outstanding at June 30, 2023		2,195,346	​	$	4.00		8.41	​	$	3
Unvested at June 30, 2023		1,097,852	​	$	1.80		9.32	​	$	3
Vested and exercisable at June 30, 2023		1,097,494	​	$	6.21		7.50	​	$	—

Schedule of Restricted Stock Units Activity

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​		​		Weighted		​	Weighted
​		​		Average		​	Average
​	​	Restricted		Grant Date		​	Remaining
​	​	Stock Units	​	Value Per Share		​	Term
Restricted Stock Units outstanding at June 30, 2023	​	521,971	​	$	1.08	​	9.46 years
Unvested at June 30, 2023		400,927	​	$	0.82	​	9.70 years
Vested and exercisable at June 30, 2023		121,044	​	$	1.95	​	8.68 years

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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.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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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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