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Share-Based Payments (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payments

Schedule of valuation assumptions for applying the Black-Scholes methodology to the options granted under share-based payments

Risk free interest rate, average	3.91%
Expected option life, average	5 years
Expected price volatility, average	91.47%
Expected dividend yield	0%

Schedule of stock option activity

		Number of Shares				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (Years)				Aggregate Intrinsic Value
As of December 31, 2021			831,071			$	6.47				4.10			$	—
Granted			—				—
Expired and canceled			(274,379	)			7.44
Forfeited prior to vesting			(68,215	)			2.50
Exercised			—				—
As of December 31, 2022			488,477			$	6.48				3.42			$	—
Granted			160,000				1.01
Expired and canceled			(35,457	)			7.29
Forfeited prior to vesting			(5,210	)			2.50
Exercised			—				—
As of December 31, 2023			607,810			$	5.03				3.32			$	—
Vested and Expected to Vest at December 31, 2022			488,477			$	6.48				3.42			$	—
Vested at December 31, 2022			373,612			$	7.72				3.22			$	—
Vested and Expected to Vest at December 31, 2023			607,810			$	5.03				3.32			$	—
Vested at December 31, 2023			403,365			$	6.90				2.51			$	—

Schedule of shares purchased and compensation expense associated with Employee Stock Purchase Plans

		2023				2022
Shares purchased under ESPP plan			13,381				7,180
Plan compensation expense		$	3			$	1

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Tabular disclosure of employee stock purchase plan activity.

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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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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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