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Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Employees and Directors Stock Options

The following table contains information concerning options granted under the existing equity incentive plan

		Three months ended June 30,
		2023								2022
		Number of options				Weighted average exercise price				Number of options				Weighted average exercise price
Outstanding at beginning of period			2,929,868			$	5.84				2,399,622			$	5.95
Forfeited and expired			(14,375	)		$	6.82				(3,000	)		$	5.34
Exercised			-			$	-				(7,625	)		$	6.49
Outstanding at end of period			2,915,493			$	5.84				2,388,997			$	5.95
Exercisable at end of period			2,090,378			$	5.59				1,728,623			$	5.10
Non-vested at beginning of period			876,851			$	6.48				722,749			$	7.67
Vested			(37,861	)		$	11.13				(59,375	)		$	(8.78	)
Forfeited			(13,875	)		$	5.90				(3,000	)		$	(5.34	)
Non-vested at the end of period			825,115			$	6.27				660,374			$	7.59

		Six months ended June 30,
		2023								2022
		Number of options				Weighted average exercise price				Number of options				Weighted average exercise price
Outstanding at beginning of period			2,939,434			$	5.85				2,142,547			$	6.02
Granted			-							$	264,700			$	5.48
Forfeited and expired			(23,941	)		$	6.71				(3,000	)		$	5.34
Exercised			-							$	(15,250	)		$	6.49
Outstanding at end of period			2,915,493			$	5.84				2,388,997			$	5.95
Exercisable at end of period			2,090,378			$	5.59				1,728,623			$	5.10
Non vested at beginning of period			986,005			$	6.46				529,082			$	8.69
Granted			-			$	-				264,700			$	5.48
Forfeited and expired			(15,375	)		$	6.73				(3,000	)		$	5.34
vested			(145,515	)		$	7.44				(130,408	)		$	7.82
Outstanding at end of period			825,115			$	6.27				660,374			$	7.59

Schedule of Exercise Prices and Remaining Contractual Life

Set forth below is data regarding the range of exercise prices and remaining contractual life for all options outstanding on June 30, 2023

Exercise price				Number of options outstanding				Remaining contractual Life (in years)				Intrinsic Value of Options Outstanding (in thousands)				No. of options exercisable
$	2.69				649,883				1.92				-				649,883
$	3.66				250,000				6.84				-				250,000
$	4.68				48,750				6.75				-				36,563
$	5.34				208,825				8.75				-				53,800
$	5.34				445,792				9.38				-				69,263
$	5.96				150,000				9.38				-				-
$	6.22				634,177				4.00				-				634,177
$	8.19				150,000				6.38				-				112,500
$	8.23				12,500				8.38				-				5,000
$	9.02				40,500				7.38				-				20,250
$	10.12				12,126				5.43				-				12,126
$	12.23				250,000				7.91				-				194,444
$	14.00				60,500				7.82				-				50,417
$	21.40				1,940				6.07				-				1,455
$	90.16				500				1.42				-				500
					2,915,493								-				2,090,378

Schedule of Restricted Stock Units

The following table contains information concerning restricted stock units granted under the existing equity incentive plan

		Three months ended June 30,
		2023								2022
		Number of shares				Weighted average grant date fair value				Number of shares				Weighted average grant date fair value
Nonvested at beginning of period			114,329			$	9.97				184,787			$	10.02
Vested			(3,438	)		$	10.28				(3,437	)		$	10.28
Forfeited			(313	)		$	14.67				-			$	-
Nonvested at end of period			110,578			$	9.95				181,350			$	10.02

		Six months ended June 30,
		2023								2022
		Number of shares				Weighted average grant date fair value				Number of shares				Weighted average grant date fair value
Nonvested at beginning of period			157,560			$	10.02				229,331			$	10.08
Vested			(46,544	)		$	10.15				(47,981	)		$	10.29
Forfeited			(438	)		$	14.67				-			$	-
Nonvested at end of period			110,578			$	9.95				181,350			$	10.02

Schedule of Share-Based Compensation Expenses Related to Grants Under the Equity Incentive Plan

The following table summarizes share-based compensation expenses related to grants under the existing equity incentive plan included in the statements of operations

		Three months ended June 30,								Six months ended June 30,
(in thousands)		2023				2022				2023				2022
Research & development		$	122			$	119			$	318			$	509
General & administrative			389				578				826				976
Total		$	511			$	697			$	1,144			$	1,485

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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 option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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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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