Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Summary of Warrants Issued and Outstanding

The following table summarizes the warrants issued and outstanding as of September 30, 2017:

	Date of		Exercise		Shares of
Description	Issuance	Expiration	Price		Common Stock
Exercisable warrants
Warrants	09/24/2014	09/24/2019	$	20.00		1,125,005
Warrants	10/20/2014	10/20/2019	$	20.00		87,500
Warrants	3/30/2016	03/30/2021	$	3.88		521,060
Total warrants issued and outstanding						1,733,565

Summary of Stock Option Activity

Stock Options – We recorded stock option expense of $479,256 and $1,623,029 for the nine months ended September 30, 2017 and 2016, respectively.  The following table summarizes the stock option activity for the nine month period ended September 30, 2017:

	Stock Options
					Weighted-
				Exercise	Average
	Number			Price Per	Exercise Price
	of Shares			Share	Per Share
Outstanding at December 31, 2016		1,317,402		$2.08 — $26.00	$	9.09
Granted		79,500		$2.13  —  $2.71	$	2.50
Canceled/Forfeited		(36,146	)	$6.40 — $23.20	$	12.35
Outstanding at September 30, 2017		1,360,756		$2.08 — $26.00	$	8.62