Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of Fair Value of Share Based Payment

The fair value of share-based payment units was estimated using the Black-Scholes option pricing model with the following assumptions and weighted average fair values as follows:

	Years Ended December 31,
	2018			2017
Valuation assumptions:
Grant price		$2.30 - $2.87			-
Exercise price		$2.30 - $2.87			-
Expected dividend yield		0	%		-
Expected volatility		94.02% - 97.22	%		-
Expected life (in years)		5			-
Risk-free interest rate		2.69% - 2.73	%		-

Schedule of Stock Option Activity

Stock option activity under the Plans during the periods indicated below is as follows:

	Number of Shares Subject to Issuance			Weighted- average Exercise Price		Weighted- average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at December 31, 2016		1,665,420		$	1.40		3.62 years		-
Granted		-			-
Forfeited or expired		(24,062	)		4.06
Exercised		(10,000	)		1.01
Outstanding at December 31, 2017		1,631,358		$	1.36		1.70 years	$	2,106,669
Granted		102,500			2.86
Forfeited or expired		(67,488	)		4.18
Exercised		(593,838	)		1.16
Outstanding at December 31, 2018		1,072,332		$	1.44		1.85 years	$	881,493
Exercisable at December 31, 2018		937,332		$	1.28		1.58 years	$	864,092

Summary of Stock Options

The following is a summary of stock options as of December 31, 2018:

		Options Outstanding						Options Exercisable
Range of Exercise Prices		Number of Options		Weighted- average Remaining Life		Weighted- average Exercise Price		Number of Options		Weighted- average Exercise Price
$	1.15 to $1.56		889,460		1.59 years	$	1.16		876,960	$	1.16
$	1.75 to $2.87		155,500		3.51 years	$	2.56		33,000	$	2.11
$	3.93		27,372		0.75 years	$	3.93		27,372	$	3.93
			1,072,332		1.85 years	$	1.44		937,332	$	1.28

Schedule of Restricted Stock Units Outstanding

Restricted stock unit activity under the Plans during the periods indicated below is as follows:

	Number of Shares			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
Outstanding at December 31, 2016		32,714			1.89		26,010
Granted		23,352			2.87
Vested and Settled in shares		(50,207	)		2.31
Outstanding at December 31, 2017		5,859		$	2.56	$	-
Granted		29,822			2.07
Vested and Settled in shares		(35,681	)		2.15
Outstanding at December 31, 2018		-		$	-	$	-

Schedule of Share Based Compensation Expense

Share based compensation expense for the years ended December 31, 2018 and 2017 is as follows:

	Years Ended December 31,
Compensation cost recognized:	2018		2017
Stock options	$	124,886	$	368,465
Restricted stock units		61,821		67,214
	$	186,707	$	435,679

Schedule of Stock Based Compensation

Share based compensation is included in operating expenses as follows:

	Years Ended December 31,
	2018		2017
Selling, general and administrative	$	169,654	$	408,772
Research and development		17,053		26,907
	$	186,707	$	435,679