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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2022

Stockholders' Equity Note [Abstract]

Schedule of activity under the stock option plans

		2010 Plan				2017 Plan				Weighted Average Exercise Price				Aggregate Intrinsic Value(1)
Outstanding as of December 31, 2020			237,500				176,500			$	6.38			$	(180,038	)
Grants			—				86,000			$	9.78
Terminations/forfeitures			(12,000	)			(20,000	)		$	7.26
Exercises			(7,000	)			(18,000	)		$	7.08
Outstanding as of December 31, 2021			218,500				224,500			$	6.94			$	468,425
Grants			—				130,500			$	8.25
Terminations/forfeitures			(6,000	)			(14,500	)		$	6.97
Exercises			(5,000	)			—			$	6.13
Outstanding as of June 30, 2022			207,500				340,500			$	7.26			$	783,518
Vested as of June 30, 2022			177,500				98,500			$	6.79			$	524,550
Vested and expected to vest as of June 30, 2022			207,500				340,500			$	7.26			$	783,518
Reserved for future grants			—				291,500

⁽¹⁾ Intrinsic value is the difference between the fair market value of the underlying common stock as of the date indicated and as of the date of the option grant (which is equal to the option exercise price).

Schedule of additional information about the stock option plans

		Number of Shares				Weighted Average Fair Value at Grant Date				Weighted Average Exercise Price
Non-vested stock options as of January 1, 2022			160,000			$	3.36			$	7.23
Non-vested stock options as of June 30, 2022			272,000			$	3.82			$	7.74
Stock options granted during the six-month period ended June 30, 2022			130,500			$	4.37			$	8.25
Stock options that vested during the six-month period ended June 30, 2022			4,000			$	3.44			$	6.54
Stock options that were forfeited during the six-month period ended June 30, 2022			20,500			$	3.83			$	6.97

Schedule of fair value stock option grant using black-scholes option pricing model with the weighted-average assumptions

		During the Three-Month Periods Ended June 30,								During the Six-Month Periods Ended June 30,
		2022				2021				2022				2021
Risk-free interest rate			3.38	%			0.90	%			2.62	%			0.86	%
Dividend yield			0	%			0	%			0	%			0	%
Expected volatility			53	%			54	%			53	%			54	%
Expected life			6.5 years				4.6 years				6.5 years				4.8 years

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.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year.

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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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