Warrants (Tables)

12 Months Ended

Dec. 31, 2017

Stockholders' Equity Note [Abstract]

Warrants

The following table summarizes warrant activity for the years ended December 31, 2017 and 2016:

	Year Ended				Year Ended
	December 31, 2017				December 31, 2016
			Wtd. Avg.				Wtd. Avg.
			Exercise				Exercise
	Shares		Price		Shares		Price
Outstanding at beginning of year		7,603,141	$	4.46		7,195,997	$	4.60
Granted		––		––		550,000		1.75
Exercised		(914,292)		4.18		(142,856)		0.84
Forfeited/Expired		––		––		––		––
Outstanding and exercisable at end of year		6,688,849	$	4.50		7,603,141	$	4.46