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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Schedule of activity under the stock option plans

		2000 Plan				2010 Plan				2017 Plan				Weighted Average Exercise Price				Aggregate Intrinsic Value(1)
Outstanding at December 31, 2017			117,500				242,500				—			$	4.58			$	1,513,980
Grants			—				48,500				122,500			$	7.38
Terminations			—				(19,000	)			(11,000	)		$	6.63
Exercises			(105,000	)			(2,000	)			—			$	1.89
Outstanding at December 31, 2018			12,500				270,000				111,500			$	6.37			$	266,020
Grants			—				26,000				25,000			$	5.90
Terminations			—				(26,000	)			(3,000	)		$	6.05
Exercises			(12,500	)			(15,000	)			—			$	4.37
Outstanding at December 31, 2019			—				255,000				133,500			$	6.48			$	(516,475	)
Vested at December 31, 2019			—				67,500				—			$	6.13			$	(65,890	)
Vested and expected to vest at
December 31, 2019			—				255,000				133,500			$	6.48			$	(516,475	)
Reserved for future grants			—				1,000				167,500

(1) Intrinsic value is the difference between the fair market value as of the date indicated and as of the date of the option grant.

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, 2019			334,000			$	3.63			$	6.64
Non-vested stock options as of December 31, 2019			321,000			$	3.49			$	6.55
Stock options granted during the year ended December 31, 2019			51,000			$	2.93			$	5.90
Stock options that vested during the year ended December 31, 2019			36,000			$	4.10			$	6.87
Stock options that were forfeited during the year ended December 31, 2019			29,000			$	3.39			$	6.05

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

		During the Year Ended December 31, 2019				During the Year Ended December 31, 2018
Risk-free interest rate			1.9	%			2.6	%
Dividend yield			0	%			0	%
Expected volatility			51	%			56	%
Expected life			6 years				5.4 years

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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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