Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The assumptions used for the periods ended September 30, 2017 and 2016, and the resulting estimates of weighted-average fair value per share of options granted during those periods, are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Volatility		96% to 98%		103% to 105%		96% to 101%		103% to 107%
Risk-free interest rate		1-2%		1-2%		1-2%		1-2%
Expected term		7 years		7 years		7 years		7 years

Schedule of Stock Options Activity

The following table summarizes all compensation plan stock options as of September 30:

	September 30, 2017						September 30, 2016
	Number of			Weighted			Number of			Weighted
	Stock Options			Exercise Price			Stock Options			Exercise Price
Options outstanding, beginning of year		557,917		$	1.60			833,967		$	1.20
Granted		41,250			4.42			33,750			3.08
Redeemed		(55,000	)		(1.28	)		(237,500	)		(0.82	)
Exercised		-			-			(15,000	)		(1.10	)
Expired / terminated		-			-			(57,717	)		(1.08	)
Options outstanding, end of period		544,167		$	2.10			557,500		$	2.46
Options exercisable, end of period		524,167		$	2.08			537,500		$	2.44