Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Assumptions in Computing Option Fair Value

The fair value of all options granted during the years ended December 31, 2014 and 2013 was determined using the following assumptions:

Expected volatility	70% — 90%
Risk free interest rate	0.80% — 1.75%
Expected term (years)	3.0 — 5.0
Dividend yield	0%

Summary of Activity Related to Options Granted

Stock option activity is as follows:

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life		Aggregate Fair Value
Outstanding December 31, 2012		3,640,324		$	1.76		2.69 Years	$	6,406,970
Granted		446,000		$	2.61
Exercised		(30,500	)	$	2.67
Forfeited		(10,500	)	$	2.35
Expired		—			—
Outstanding December 31, 2013		4,045,324		$	1.85		2.05 Years	$	7,483,849
Granted		252,000		$	3.80
Exercised		(1,138,331	)	$	0.78
Forfeited		(14,000	)	$	2.43
Expired
Outstanding December 31, 2014		3,144,993		$	2.39		1.48 Years	$	7,516,533
Exercisable at, December 31, 2014		2,829,329		$	2.29			$	6,479,163
Unvested at December 31, 2014		315,664