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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

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 Company has applied fair value accounting for all share based payment awards since inception. The fair value of each option or warrant granted is estimated on the date of grant using the Black-Scholes option pricing model. The Black-Scholes assumptions used in the years ended December 31, 2012 and 2011 are as follows:

	Year ended December 31,
	2012	2011
Exercise price	$1.69 - $2.47	$0.49 - $2.22
Expected dividends	0%	0%
Expected volatility	108% - 174%	175% - 188%
Risk fee interest rate	0.37% - 1.98%	1.30% - 3.58%
Expected life of option	5 - 10 years	5 - 7 years
Expected forfeitures	0%	0%

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

During 2012, the Company granted 2,075,000 options to employees and consultants having an approximate fair value of $4.5 million based upon the Black-Scholes option pricing model. During 2011, the Company granted 557,002 options to employees and consultants having an approximate fair value of $609,000 based upon the Black-Scholes option pricing model.

						Weighted
						Average
				Weighted		Remaining		Aggregate
				Average Exercise		Contractual		Intrinsic
	Options			Price		Life		Value
Balance – December 31, 2010		2,539,091		$	1.32		6.97 years	$	1,028,000
Granted		557,002		$	1.26
Exercised		(23,333	)	$	0.57
Forfeited		(93,750	)	$	0.59
Balance – December 31, 2011		2,979,010		$	1.34		6.01 years	$	-
Granted		2,075,000		$	2.21
Exercised		(374,851	)	$	0.34
Forfeited		(225,413	)	$	2.37
Balance – December 31, 2012 – outstanding		4,453,746		$	1.78		6.43 years	$	1,308,000
Balance – December 31, 2012 – exercisable		2,891,877		$	1.60		5.71 years	$	1,160,000

Grant date fair value of options granted – 2012				$	4,467,984
Weighted average grant date fair value – 2012				$	2.15
Grant date fair value of options granted – 2011				$	609,000
Weighted average grant date fair value – 2011				$	1.09

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, 2012 are as follows:

Options Outstanding						Options Exercisable
			Weighted		Weighted Average			Weighted		Weighted Average
Range of			Average		Remaining			Average		Remaining
Exercise Price	Options		Exercise Price		Contractual Life	Options		Exercise Price		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

The options outstanding and exercisable at December 31, 2011 are as follows:

Options Outstanding						Options Exercisable
			Weighted		Weighted Average			Weighted		Weighted Average
Range of			Average		Remaining			Average		Remaining
Exercise Price	Options		Exercise Price		Contractual Life	Options		Exercise Price		Contractual Life
$0.09 - $4.57		2,889,011	$	1.20	6.11 years		2,364,608	$	1.29	5.72 years
$4.58 - $9.05		89,999		5.93	2.76 years		89,999		5.93	2.76 years
$0.09 - $9.05		2,979,010	$	1.34	6.01 years		2,454,607	$	1.46	5.62 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, 2012:

				Weighted Average
	Unvested			Grant
	Stock Options			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
Weighted average remaining period for vesting		2.09 years

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 Share Based Payment Award Warrants Valuation Assumptions [Table Text Block]

On April 6, 2011, the fair value of the warrant liability was $1.5 million, which represented an increase in fair value of $765,000. The fair value was measured using the Black-Scholes valuation model. The assumptions used by the Company are summarized in the following table:

				Remeasurement
	Commitment			Date
	Date			April 6, 2011
Closing stock price	$	1.39		$	2.08
Expected dividend rate		0	%		0	%
Expected stock price volatility		117.1	%		104.6	%
Risk free interest rate		0.28	%		0.29	%
Expected life (years)		1.08			0.85

On July 28, 2011, the fair value of the warrant liability was $253,000, which represented a decrease in fair value of $523,000. The fair value is measured using the Black-Scholes valuation model. The assumptions used by the Company are summarized in the following table:

				Remeasurement
	Commitment			Date
	Date			July 28, 2011
Closing stock price	$	2.08		$	0.84
Expected dividend rate		0	%		0	%
Expected stock price volatility		112.1	%		105.6	%
Risk free interest rate		0.29	%		0.21	%
Expected life (years)		1.08			1.04

Schedule of Derivative Liabilities at Fair Value [Table Text Block]

The following table summarizes the estimated fair value of the warrant liabilities at December 31, 2011(in thousands):

Balance at December 31, 2010	$	-
Warrant liability		1,492
Change in fair value of warrant liability		242
Reclassification to additional paid-in capital		(1,734	)
Balance at December 31, 2011	$	-

Schedule Of Warrant Activity [Table Text Block]

A summary of warrant activity for the Company for the year ended December 31, 2011 and for the year ended December 31, 2012 is as follows:

				Weighted Average
	Number of Warrants			Exercise Price
Balance at December 31, 2010		1,131,078		$	3.49
Granted		2,272,963			1.25
Exercised		(15,615	)		1.03
Forfeited		(129,240	)		2.08
Balance as 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 as December 31, 2012		1,632,501		$	1.99

Schedule Of Warrant Outstanding and Exercisable [Table Text Block]

A summary of all outstanding and exercisable warrants as of December 31, 2012 is as follows:

Exercise Price		Warrants Outstanding		Warrants Exercisable		Weighted Average Remaining Contractual Life		Aggregate Intrinsic Value
$	1.14		100,000		100,000		4.09 years	$	62,000
$	1.32		18,182		18,182		3.00 years	$	8,000
$	1.60		635,855		635,855		4.83 years	$	102,000
$	2.20		250,000		50,000		1.20 years	$
$	2.22		517,257		517,257		3.91 years	$	-
$	3.30		61,207		61,207		3.30 years	$	-
$	3.75		50,000		50,000		3.13 years	$	-
$	1.99		1,632,501		1,432,501		3.80 years	$	172,000