Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

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

Schedule of stock based compensation expense allocation

The following table summarizes stock-based compensation costs for the years ended December 31, 2012, 2011 and 2010:

	Twelve Months Ended
	December 31,
	2012		2011		2010
Employee stock-based compensation in:
Cost of revenue	$	22,804	$	12,227	$	138,444
Selling and distribution	—		—		1,118,221
General and administrative	605,349		723,034		1,297,927
Research and development	40,239		79,259		245,664
Total employee stock-based compensationin operating expenses	645,588		802,293		2,661,812
Total employee stock-based compensation	$	668,392	$	814,520	$	2,800,256

The assumptions used to value options granted

During years ended December 31, 2012, 2011 and 2010, the Company recorded income of $6,995,099, $556,662 and losses of $5,229,089, respectively, to adjust the value of the stock warrant liability to market.

	2012		2011		2010
Stock Price	$0.64		$2.50		$2.27
Exercise Price	$1.52		$1.52		$1.52
Risk free interest rate	0.25	%	0.36	%	2.01	%
Expected term	2.25		3.25		4.25
Dividend yield	—		—		—
Expected volatility	103.1	%	83.24	%	95.89	%

The assumptions used to value options granted are as follows:

	2012		2011		2010
Risk free interest rate	0.82	%	2.11	%	1.38	%
Expected term	4.75 years		4.75 years		4.75 years
Dividend yield	—		—		—
Expected volatility	93.57	%	92.72	%	92.45	%

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

A summary of the status of the Company’s two stock option plans as of December 31, 2012, 2011, and 2010 is presented below:

	2012			2011			2010
			Weighted-			Weighted-			Weighted-
			Average			Average			Average
			Exercise			Exercise			Exercise
	Shares		Price	Shares		Price	Shares		Price
Outstanding at beginning of year	5,104,215		$2.51	6,334,029		$2.56	5,960,304		$2.70
Granted	835,000		0.66	1,035,000		2.67	1,048,000		1.07
Exercised	—		—	(1,685,014	)	1.60	(59,375	)	1.33
Forfeited	(1,988,025	)	2.85	(579,800	)	4.69	(614,900	)	3.37
Outstanding at end of year	3,951,190		$1.90	5,104,215		$2.51	6,334,029		$2.56
Options exercisable at year end	2,429,940			3,556,965			5,326,029

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

A summary of the Company’s restricted stock activity and related information for 2012 is as follows:

	2012			2011			2010
	Shares		Weighted Average Grant Date Fair Value	Shares		Weighted Average Grant Date Fair Value	Shares		Weighted Average Grant Date Fair Value
Unvested at beginning of period	34,880		$3.44	112,148		$1.07	337,039		$1.55
Granted	176,468		0.68	34,880		3.44	112,148		1.07
Vested	(34,880	)	0.68	(112,148	)	3.44	(290,109	)	1.07
Forfeited	—		—	—		—	(46,930	)	3.92
Unvested at December 31, 2012	176,468		$0.68	34,880		$3.44	112,148		$1.07