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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2023

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, 2021			218,500				224,500			$	6.94			$	468,425
Grants			—				210,500			$	7.73
Terminations/forfeitures(2)			(11,000	)			(32,500	)		$	7.34
Exercises			(5,000	)			—			$	6.13
Outstanding as of December 31, 2022			202,500				402,500			$	7.19			$	(661,310	)
Grants			—				84,000			$	5.22
Terminations/forfeitures(2)			—				(63,000	)		$	7.19
Exercises			—				—			$	—
Outstanding as of March 31, 2023			202,500				423,500			$	6.93			$	(1,107,030	)
Vested as of March 31, 2023			188,500				59,500			$	6.45			$	(318,895	)
Vested and expected to vest as of March 31, 2023			202,500				423,500			$	6.93			$	(1,107,030	)
Reserved for future grants			—				208,500

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, 2023			307,000			$	3.80			$	7.71
Non-vested stock options as of March 31, 2023			378,000			$	3.63			$	7.25
Stock options granted during the three-month period ended March 31, 2023			84,000			$	2.88			$	5.22
Stock options that vested during the three-month period ended March 31, 2023			10,000			$	2.03			$	4.00
Stock options that were terminated or forfeited during the three-month period ended March 31, 2023			63,000			$	3.27			$	7.19

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

		During the Three-Month Periods Ended March 31,
		2023				2022
Risk-free interest rate(1)			3.54	%			1.63	%
Dividend yield(2)			0	%			0	%
Expected volatility(2)			55	%			52	%
Expected life(3)			6.5 years				6.5 years

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- 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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-Section 50
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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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- Definition

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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