Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation Arrangement by Share-based Payment Award Options and Warrants Vested and Expected to Vest Outstanding and Exercisable [Table Text Block]

The Black-Scholes assumptions used in the years ended December 31, 2014, 2013 and 2012 are as follows:

Year ended December 31,

2014

2013

2012

Exercise price

$1.46 – $2.91

$1.64 – $1.74

$1.69 – $2.47

Expected dividends

Expected volatility

101% – 150%

141% – 154%

108% – 174%

Risk free interest rate

1.57% – 2.73%

0.77% – 2.54%

0.37% – 1.98%

Expected life of option

5 years – 10 years

5 – 10 years

Expected forfeitures

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of stock option activities for the years ended December 31, 2014, 2013 and 2012, is as follows:


	Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life		Aggregate Intrinsic Value
Balance – December 31, 2011		2,979,010		$	1.34		6.01 years	$	—
Granted		2,075,000		$	2.21
Exercised		(374,851	)	$	0.34			$	661,000
Forfeited		(225,413	)	$	2.37
Balance – December 31, 2012		4,453,746		$	1.78		6.43 years	$	1,308,000
Granted		222,500		$	1.69
Exercised		(291,666	)	$	0.79			$	71,000
Forfeited		(475,000	)	$	2.30
Balance – December 31, 2013		3,909,580		$	1.78		5.59 years	$	785,000
Granted		2,382,500		$	2.36
Exercised		(6,583	)	$	0.58			$	8,000
Forfeited		(304,391	)	$	1.93
Balance – December 31, 2014 – outstanding		5,981,106		$	2.01		5.80 years	$	685,000
Balance – December 31, 2014 – exercisable		3,893,196		$	1.85		5.12 years	$	685,000
Grant date fair value of options granted – 2014				$	4,974,000
Weighted average grant date fair value – 2014				$	2.09
Grant date fair value of options granted – 2013				$	350,000
Weighted average grant date fair value – 2013				$	1.57
Grant date fair value of options granted – 2012				$	4,468,000
Weighted average grant date fair value – 2012				$	2.15

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

The options outstanding and exercisable at December 31, 2014 are as follows:


Options Outstanding								Options Exercisable
Range of Exercise Price		Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life		Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life
$	0.09 – $2.00		2,703,280	$	1.37		4.33 years		2,018,074	$	1.28		3.73 years
$	2.01 – $3.00		3,232,002		2.49		7.08 years		1,829,298		2.40		6.73 years
$	3.01 – $6.00		45,824		5.24		2.62 years		45,824		5.24		2.62 years
$	0.09 – $6.00		5,981,106	$	2.01		5.80 years		3,893,196	$	1.85		5.12 years

The options outstanding and exercisable at December 31, 2013 are as follows:


Options Outstanding								Options Exercisable
Range of Exercise Price		Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life		Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life
$	0.09 – $2.00		2,093,196	$	1.29		4.73 years		1,901,737	$	1.25		4.64 years
$	2.01 – $3.00		1,770,560		2.28		6.65 years		1,205,976		2.26		6.25 years
$	3.01 – $6.00		45,824		5.24		3.62 years		45,824		5.24		3.62 years
$	0.09 – $6.00		3,909,580	$	1.78		5.59 years		3,153,537	$	1.69		5.24 years

The options outstanding and exercisable at December 31, 2012 are as follows:


Options Outstanding								Options Exercisable
Range of Exercise Price		Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life		Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life
$	0.09 – $2.00		2,162,362	$	1.78		5.76 years		1,801,187	$	1.14		5.52 years
$	2.01 – $3.00		2,212,227		2.26		7.15 years		1,011,533		2.17		6.14 years
$	3.01 – $6.00		79,157		4.87		4.49 years		79,157		4.87		4.49 years
$	0.09 – $6.00		4,453,746	$	1.78		6.43 years		2,891,877	$	1.60		5.71 years

Share-based Compensation Arrangement by Share-based Payment Award, Options, Non Vested and Expected to Vest Exercisable [Table Text Block]

The following is a summary of the Company’s non-vested stock options at December 31, 2014:


	Unvested Stock Options			Weighted Average Grant Date Fair Value
Non-vested – December 31, 2011		524,403		$	0.82
Granted		2,075,000			2.21
Vested/Exercised		(891,332	)		0.81
Forfeited/Cancelled		(146,202	)		1.79
Non-vested – December 31, 2012		1,561,869		$	2.11
Granted		222,500			1.69
Vested/Exercised		(883,882	)		1.93
Forfeited/Cancelled		(144,444	)		2.27
Non-vested – December 31, 2013		756,043			2.17
Granted		2,382,500			2.36
Vested/Exercised		(1,050,633	)		2.35
Non-vested – December 31, 2014		2,087,910		$	2.30
Weighted average remaining period for vesting		2.15 years

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block]

The assumptions used by the Company are summarized in the following table:


	Issuance Date			December 31, 2014
Closing stock price		$1.75			$1.46
Expected dividends		0	%		0	%
Expected volatility		95	%		90	%
Risk free interest rate		1.39	%		1.59	%
Expected life of warrant		5 years			4.79 years

Schedule Of Estimated Fair Value Of The Warrant Liability [Table Text Block]

The following table summarizes the estimated fair value of the warrant liability (in thousands):


Balance at December 31, 2013	$	—
Warrants liability		7,376
Change in fair value of warrant liability		(620	)
Balance at December 31, 2014	$	6,756

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The assumptions used by the Company are summarized in the following table:


Exercise price	$2.20
Expected dividends	0	%
Expected volatility	110	%
Risk free interest rate	0.26	%
Expected life of warrant	2 years

The assumptions used by the Company are summarized in the following table:


Exercise price	$1.14
Expected dividends	0	%
Expected volatility	174	%
Risk free interest rate	0.71	%
Expected life of warrant	5 years

Schedule of Warrant Activity [Table Text Block]

A summary of warrant activity for the Company for the years ended December 31, 2014, 2013 and 2012 is as follows:


	Number of Warrants			Weighted Average Exercise Price
Balance at December 31, 2011		3,259,186		$	1.95
Granted		985,855		$	1.71
Exercised		(1,768,167	)	$	1.11
Forfeited		(844,373	)	$	3.32
Balance at December 31, 2012		1,632,501		$	1.99
Granted		—		$	—
Exercised		—		$	—
Forfeited		—		$	—
Balance at December 31, 2013		1,632,501		$	1.99
Granted		7,029,808		$	1.75
Exercised		(232,619	)	$	1.47
Forfeited		(454,896	)	$	1.88
Balance at December 31, 2014		7,974,794		$	1.80

Schedule of Warrant Outstanding and Exercisable [Table Text Block]

A summary of all outstanding and exercisable warrants as of December 31, 2014 is as follows:

Exercise Price		Warrants Outstanding		Warrants Exercisable		Weighted Average Remaining Contractual Life
	$1.60		316,522		316,522		2.82 years
	$1.75		7,029,808		7,029,808		4.78 years
	$2.22		517,257		517,257		1.91 years
	$3.30		61,207		61,207		0.41 years
	$3.75		50,000		50,000		1.13 years
	$1.99		7,974,794		7,974,794		4.46 years