XML 44 R31.htm IDEA: XBRL DOCUMENT v3.22.4

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

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 years ended 2021 and 2022 as shown in the following table (in thousands):

​	​	​	​	​	​	​
​		Year Ended
​		December 31,
​	​	2022			2021
General and administrative	​	$	1,051	​	$	819
Research and development	​	​	455	​	​	338
Stock-based compensation costs before income taxes	​	$	1,506	​	$	1,157

​

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	​	552,153	​	$	4.26		—	​		—
Exercised	​	(6,600)	​	$	3.35		—	​		—
Cancelled/forfeited	​	(48,879)	​	$	14.18		—	​		—
Options outstanding at December 31, 2021		1,099,357	​	$	7.53		8.99	​	$	189
Granted		522,337	​	$	2.41		—	​		—
Cancelled/forfeited		(11,104)	​	$	10.49		​	​		​
Options outstanding at December 31, 2022		1,610,590	​	$	5.85		8.34	​	$	—
Unvested at December 31, 2022		872,957	​	$	3.09		8.92	​	$	—
Vested and exercisable at December 31, 2022		737,633	​	$	9.11		7.67	​	$	—

​

Schedule of Fair Value of the Stock Options Granted

The fair value of the stock options granted is calculated using the Black-Scholes option-pricing model as prescribed by ASC 718 using the following assumptions:

​	​	​	​	​
​	​	​	​	​
​	​	Year ended	​	Year ended
​		December 31, 2022		December 31, 2021
Expected term (years)		5 – 6		5 – 6
Risk free interest rate		1.370% – 3.605%	​	0.420%  – 1.290%
Volatility		86% – 93%	​	95% – 102%
Expected dividend yield over expected term		0.00%	​	0.00%
Resulting weighted average grant date fair value		$1.76	​	$3.36
​	​	​	​	​

​

Schedule of Restricted Stock Units Activity

​

​	​	​	​	​	​
​		​		Weighted
​		​		Average
​	​	Restricted		Grant Date
​	​	Stock Units	​	Value Per Share
Restricted Stock Units outstanding at December 31, 2020		16,524	​	$	11.30
Granted		18,992	​	​	6.69
Cancelled/forfeited		(16,524)	​	​	15.20
Restricted Stock Units outstanding at December 31, 2021		18,992	​	$	6.69
Granted	​	118,665	​	​	1.11
Restricted Stock Units outstanding at December 31, 2022	​	137,657	​	$	1.88
​	​	​	​	​	​
Unvested at December 31, 2022		120,248	​	$	1.18
Vested and exercisable at December 31, 2022		17,409	​	$	6.69

X

- References

No definition available.

+ Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

+ Details

Name:	us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration