Accounting for Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of stock option activities

	June 30, 2022
	Number of Options			Weighted-Average Exercise Price
Outstanding at beginning of year		617,273		$	6.47
Granted		167,500			3.64
Exercised		(96,000	)		0.68
Forfeited		(123,334	)		7.50
Expired		(4,334	)		9.26
Outstanding at June 30, 2022		561,105		$	6.23
Options exercisable at June 30, 2022		293,270		$	4.73

Valuation assumptions for stock-based compensation

	For Three Months Ended June 30, 2022		For Three Months Ended June 30, 2021		For Six Months Ended June 30, 2022		For Six Months Ended June 30, 2021
Weighted average grant date fair value	$	–	$	8.33	$	3.34	$	8.99
Weighted average assumptions used:
Expected dividend yield		0.0%		0.0%		0.0%		0.0%
Risk-free interest rate		0.0%		0.81%		0.88%		0.80%
Expected volatility		0.0%		83.00%		133.0%		81.81%
Expected life (in years)		–		5.0		6.6		5.0