Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

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, 2015, 2014 and 2013 are as follows:

Year ended December 31,

2015

2014

2013

Exercise price

1.54 – $2.76

1.46 – $2.91

1.64 – $1.74

Expected dividends

Expected volatility

88% – 131%

101% – 150%

141% – 154%

Risk free interest rate

1.32% – 2.19%

1.57% – 2.73%

0.77% – 2.54%

Expected life of option

5 years – 10 years

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

A summary of stock option activities for the years ended December 31, 2015, 2014 and 2013, is as follows:

	Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life		Aggregate Intrinsic Value
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		5,981,106		$	2.01		5.80 years	$	685,000
Granted		3,781,666		$	2.37
Exercised		(35,008	)	$	1.16			$	44,000
Expired		(483,332	)	$	2.48
Forfeited		(302,502	)	$	1.91
Balance – December 31, 2015 – outstanding		8,941,930		$	2.14		5.67 years	$	2,900,000
Balance – December 31, 2015 – exercisable		4,757,754		$	1.92		4.54 years	$	2,272,000
Grant date fair value of options granted – 2015				$	7,974,000
Weighted average grant date fair value – 2015				$	2.12
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

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, 2015 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		3,029,938	$	1.40		4.12 years		2,363,683	$	1.34		3.38 years
$	2.01 – $3.00		5,866,168		2.50		6.50 years		2,348,247		2.44		5.76 years
$	3.01 – $6.00		45,824		5.24		1.62 years		45,824		5.24		1.62 years
$	0.09 – $6.00		8,941,930	$	2.14		5.67 years		4,757,754	$	1.92		4.54 years

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

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, 2015:

	Unvested Stock Options			Weighted Average Grant Date Fair Value
Balance – December 31, 2012		1,561,869		$	2.11
Granted		222,500		$	1.57
Vested/Exercised		(883,882	)	$	1.93
Forfeited/Cancelled		(144,444	)	$	2.27
Balance – December 31, 2013		756,043		$	2.17
Granted		2,382,500		$	2.09
Vested/Exercised		(1,050,633	)	$	2.35
Balance – December 31, 2014		2,087,910		$	2.30
Granted		3,781,666		$	2.12
Vested/Exercised		(1,382,898	)	$	2.02
Forfeited/Cancelled		(302,502	)	$	1.92
Non-vested – December 31, 2015		4,184,176		$	1.97
Weighted average remaining period for vesting		2.36 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		December 31, 2015
Closing stock price		$1.75		$1.46		$2.29
Expected dividends		0%		0%		0%
Expected volatility		95%		90%		85%
Risk free interest rate		1.39%		1.59%		1.49%
Expected life of warrant		5 years		4.7 years		3.79 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
Change in fair value of warrant liability		3,811
Balance at December 31, 2015	$	10,567

Schedule of Warrant Activity [Table Text Block]

A summary of warrant activity for the Company for the years ended December 31, 2015, 2014 and 2013 is as follows:

	Number of Warrants			Weighted Average Exercise Price
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
Granted		—		$	—
Exercised		(2,446	)	$	1.60
Forfeited		(63,449	)	$	1.79
Balance at December 31, 2015		7,908,899		$	1.79

Schedule of Warrant Outstanding and Exercisable [Table Text Block]

A summary of all outstanding and exercisable warrants as of December 31, 2015 is as follows:

Exercise Price		Warrants Outstanding		Warrants Exercisable		Weighted Average Remaining Contractual Life
$	1.60		311,834		311,834		1.82 years
$	1.75		7,029,808		7,029,808		3.78 years
$	2.22		517,257		517,257		0.91 years
$	3.75		50,000		50,000		0.13 years
$	1.79		7,908,899		7,908,899		3.49 years