Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

Schedule of Estimated Weighted Average Fair Value of Options Granted

The assumptions used for the periods ended March 31, 2018 and 2017, and the resulting estimates of weighted-average fair value per share of options granted during those periods, are as follows:

	Three Months March 31,
	2018		2017
Volatility		-		99% to 101%
Risk-free interest rate		-		1-2%
Expected term		-		7 years

Schedule of Stock Options Activity

The following table summarizes all compensation plan stock options as of March 31:

	March 31, 2018				March 31, 2017
	Number of Stock		Weighted Exercise		Number of Stock			Weighted Exercise
	Options		Price		Options			Price
Options outstanding, beginning of year		531,667	$	1.80		557,917		$	1.55
Granted		-		-		13,750			5.20
Redeemed		-		-		(12,500	)		1.40
Exercised		-		-		-			-
Expired / terminated		-		-		-			-
Options outstanding, end of quarter		531,667	$	1.80		559,167		$	1.64
Options exercisable, end of quarter		521,667	$	1.82		539,167		$	1.68