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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 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, 2019			255,000				133,500			$	6.48			$	(516,475	)
Grants			7,000				93,000			$	5.03
Terminations/forfeitures			(12,000	)			(50,000	)		$	5.45
Exercises			(12,500	)			—			$	3.15
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			—				57,000			$	8.17
Terminations/forfeitures			—				(2,000	)		$	4.25
Exercises			(1,000	)			—			$	5.84
Outstanding as of March 31, 2022			217,500				279,500			$	7.10			$	1,269,335
Vested as of March 31, 2022			183,500				98,500			$	6.78			$	808,490
Vested and expected to vest as of March 31, 2022			217,500				279,500			$	7.10			$	1,269,335
Reserved for future grants			—				2,500

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 March 31, 2022			215,000			$	3.61			$	7.51
Stock options granted during the three-month period ended March 31, 2022			57,000			$	4.26			$	8.17
Stock options that vested during the three-month period ended March 31, 2022			—			$	—			$	—
Stock options that were forfeited during the three-month period ended March 31, 2022			2,000			$	2.16			$	4.25

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

		During the Three-Month Periods Ended March 31,
		2022				2021
Risk-free interest rate			1.63	%			0.43	%
Dividend yield			0	%			0	%
Expected volatility			52	%			53	%
Expected life			6.5 years				6.5 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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
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- Definition

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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