Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Class Of Stock [Line Items]

Schedule of Assumptions for Fair Value of Option Grant

In connection with the stock option grants during 2021 and 2020, the fair value of each option grant was estimated on the date of the grant using the Black-Scholes option pricing model with the following assumptions:

	2021	2020
Risk-free interest rate	0% - 1%	0% - 2%
Expected life (years)	6.6	6.8
Expected volatility	80%	74%
Expected dividend yield	Zero	Zero

Schedule of Changes in Common Stock Options

The following summarizes the changes in common stock options for 2021 and 2020:

	2021					2020
	Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price
Outstanding at beginning of year		3,516,225		$	0.63		3,611,850		$	0.51
Granted		722,500		$	2.28		474,750		$	1.62
Exercised		(1,895,437	)	$	0.48		(383,350	)	$	0.46
Expired		—		$	—		(20,000	)	$	0.83
Forfeited		(150,000	)	$	1.61		(167,025	)	$	1.15
Outstanding at end of year		2,193,288		$	1.23		3,516,225		$	0.63
Options exercisable at year end		978,350		$	0.60		2,566,100		$	0.47
Weighted-average fair value of options granted    during the year				$	1.59				$	1.64

Schedule of Information about All Stock Options Outstanding

The following table summarizes information about all stock options outstanding at December 31, 2021:

Exercise price	Options Outstanding		Weighted Average Remaining Life (years)		Weighted Average Exercise Price		Number Exercisable		Weighted Average Remaining Life (years)		Weighted Average Exercise Price
$ 0.24 to $ 0.48		742,225		5.0	$	0.44		700,600		4.9	$	0.44
$ 0.53 to $ 0.95		501,063		7.7	$	0.76		212,750		7.6	$	0.76
$ 1.41 to $ 1.90		612,500		9.3	$	1.47		47,500		8.5	$	1.47
$ 2.77 to $ 3.33		337,500		9.2	$	2.77		17,500		8.6	$	2.77
		2,193,288						978,350

Other Options Issued [Member]

Class Of Stock [Line Items]

Schedule of Stock Options and Other Stock Options Issued

Other Options	2021			2020
Options outstanding, beginning of year		344,375			265,000
Options issued		150,000			90,000
Options exercised		(22,500	)		(10,625	)
Options forfeited		(67,500	)		—
Options outstanding, end of year		404,375			344,375

2003 Stock Option and Appreciation Rights Plan [Member]

Class Of Stock [Line Items]

Schedule of Stock Options and Other Stock Options Issued

2003 Plan	2021		2020
Options outstanding, beginning of year		—		20,000
Options expired		—		(20,000	)
Options outstanding, end of year		—		—

2010 Non-Qualified Stock Option Plan [Member]

Class Of Stock [Line Items]

Schedule of Stock Options and Other Stock Options Issued

2010 Plan	2021			2020
Options outstanding, beginning of year		1,100,000			975,000
Options granted		50,000			125,000
Options exercised		(793,750	)		—
Options forfeited		(25,000	)		—
Options outstanding, end of year		331,250			1,100,000

2016 Stock Option Plan [Member]

Class Of Stock [Line Items]

Schedule of Stock Options and Other Stock Options Issued

2016 Plan	2021			2020
Options outstanding, beginning of year		2,071,850			2,351,850
Options granted		522,500			259,750
Options exercised		(1,079,187	)		(372,725	)
Options forfeited		(57,500	)		(167,025	)
Options outstanding, end of year		1,457,663			2,071,850