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Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

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,

​

2022

2021

2022

2021

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General and administrative

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$

216

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$

190

​

$

469

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$

364

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Research and development

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​

134

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$

88

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$

262

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$

169

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Stock-based compensation costs before income taxes

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$

350

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$

278

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$

730

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$

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, 2022		June 30, 2021
Expected term (years)		5 – 6		5 – 6
Risk free interest rate		1.370% – 3.605%	​	0.420% – 1.00%
Volatility		87 – 93%	​	98 – 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:

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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, 2021		1,099,357	​	$	7.53		8.99	​	$	189
Granted		517,337	​	$	2.42		—	​		—
Cancelled/forfeited		(3,604)	​	$	28.15		​	​		​
Options outstanding at June 30, 2022		1,613,090	​	$	5.84		8.85	​	$	—
​	​	​	​	​	​	​	​	​	​	​
Unvested at June 30, 2022		1,090,833	​	$	3.25		9.35	​	$	—
Vested and exercisable at June 30, 2022		522,257	​	$	11.25		7.79	​	$	—

Schedule of Restricted Stock Units Activity

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​	​	​	​	​	​
​		​		Weighted
​		​		Average
​	​	Restricted		Grant Date
​	​	Stock Units	​	Value Per Share
Restricted Stock Units outstanding at December 31, 2021		18,992	​	$	6.69
Granted	​	118,665	​	​	1.11
Restricted Stock Units outstanding at June 30, 2022	​	137,657	​	$	—
​	​	​	​	​	​
Unvested at June 30, 2022		120,248	​	$	1.18
Vested and exercisable at June 30, 2022		17,409	​	$	6.69

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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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