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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2021

Stock-Based Compensation [Abstract]

Schedule of Stock Based Compensation Expense

Stock based compensation has been reported within expense line items on the consolidated statement of operations for the three and six months ended June 30, 2020 and 2021 as shown in the following table (in $000s):

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Three Months Ended

Six Months Ended

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June 30,

June 30,

​

2020

2021

2020

2021

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General and administrative

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$

52

​

$

190

​

$

107

​

$

364

​

Research and development

​

​

34

​

​

88

​

​

69

​

169

​

Stock-based compensation costs before income taxes

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$

86

​

$

278

​

$

176

​

$

533

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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, 2020		June 30, 2021
Expected term (years)		6		5 – 6
Risk free interest rate		0.425%	​	0.420% – 1.000%
Volatility		114%	​	99 – 102%
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:

​	​	​	​	​	​	​	​	​	​	​
​		​		​	​		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, 2020		602,683	​	$	11.01		9.39	​	$	1,861
Granted		129,153	​	$	6.57		—	​		—
Exercised		—	​	​	—		—	​		—
Cancelled/forfeited		(74)	​	$	2,570.42		—	​		—
Options outstanding at June 30, 2021		731,762	​	$	9.97		9.04	​	$	894
​	​	​	​	​	​	​	​	​	​	​
Unvested at June 30, 2021		558,002	​	$	4.89		9.44	​	$	824
Vested and exercisable at June 30, 2021		173,760	​	$	26.28		7.79	​	$	70

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, 2021		35,516	​	$	8.84	​	9.26 years
​	​	​	​	​	​	​	​
Unvested at June 30, 2021		35,516	​	$	8.84	​	9.26 years
Vested and exercisable at June 30, 2021		—	​	$	—	​	9.26 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 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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