Stock-Based Compensation/Options and Warrants (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Summary Information Regarding Options and Warrants

Summary information regarding options and warrants from December 31, 2006 is as follows:

	Options			Weighted Average Exercise Price		Warrants			Weighted Average Exercise Price
Outstanding at December 31, 2006		190,426		$	45.92		917,590		$	78.04
Year ended December 31, 2007:
Granted		73,475			21.12		—			—
Forfeited and canceled		(4,336	)		30.96		—			—
Outstanding at December 31, 2007		259,565		$	39.16		917,590		$	78.04
Year ended December 31, 2008:
Granted		160,100			4.50		1,682,209			7.84
Forfeited and canceled		(31,617	)		24.41		—			—
Outstanding at December 31, 2008		388,048		$	25.88		2,599,799		$	32.60
Year ended December 31, 2009:
Granted		193,583			3.83		801,143			6.68
Exercised		(15,193	)		4.21		(179,691	)		6.64
Forfeited and canceled		(85,605	)		42.22		(52,082	)		20.00
Outstanding at December 31, 2009		480,833		$	14.80		3,169,169		$	27.72
Year ended December 31, 2010:
Granted		38,138			8.34		1,966			8.00
Exercised		(36,284	)		3.56		(17,102	)		8.40
Forfeited and canceled		(97,171	)		36.62		(289,160	)		117.60
Outstanding at December 31, 2010		385,516		$	8.60		2,864,873		$	11.00
Year ended December 31, 2011:
Granted		76,157			6.29		414,649			10.44
Exercised		—			—		—			—
Forfeited and canceled		(18,750	)		20.00		(671,972	)		23.72
Outstanding at December 31, 2011		442,923		$	7.71		2,607,550		$	6.66
Year ended December 31, 2012:
Granted		411,938			3.68		1,436,121			2.56
Exercised		—			—		—			—
Forfeited and canceled		(30,241	)		11.80		(464,584	)		6.12
Outstanding at December 31, 2012		824,620		$	5.54		3,579,087		$	5.64

Summary of Options Outstanding and Exercisable

Summary of options outstanding and exercisable as of December 31, 2012 is as follows:

Range of Exercise Prices	Weighted Average Remaining Contractual Life (years)		Number of Options Outstanding		Number of Options Exercisable
$ 0.88 to $ 4.99		5.84		599,706		258,337
5.00 to 9.99		1.58		178,054		157,221
10.00 to 39.20		0.21		46,860		46,860
$ 0.88 to $39.20		7.63		824,620		462,418

Summary of Warrants Outstanding and Exercisable

Summary of warrants outstanding and exercisable as of December 31, 2012 is as follows:

Range of Exercise Prices	Weighted Average Remaining Contractual Life (years)		Number of Warrants Outstanding		Number of Warrants Exercisable
$ 0.18 to $ 4.99		1.86		1,850,102		413,981
5.00 to 9.99		0.04		1,068,905		1,068,905
10.00 to 10.44		0.53		660,080		660,080
$ 0.18 to $10.44		2.43		3,579,087		2,142,966

Stock Option Activity

A summary of stock option activity for the three months ended March 31, 2013 is presented below:

	Number of Shares			Wtd. Avg. Exercise Price		Wtd. Avg. Remaining Contract Term (# years)		Intrinsic Value
Outstanding at January 1, 2013		824,620		$	5.54
Granted		125,000			2.34
Exercised		—			—
Forfeited and canceled		(46,331	)		4.73
Outstanding at March 31, 2013		903,289		$	5.14		7.7	$	104,769
Exercisable at March 31, 2013		485,124		$	6.63		6.5	$	100,730

Warrant Activity

A summary of warrant activity for the three months ended March 31, 2013 is presented below:

	Number of Shares			Wtd. Avg. Exercise Price		Wtd. Avg. Remaining Contract Term (# years)		Intrinsic Value
Outstanding at January 1, 2013		3,579,087		$	5.64
Granted		972,918			2.21
Exercised		—			—
Forfeited and canceled		(1,129,359	)		7.65
Outstanding at March 31, 2013		3,422,646		$	4.01		3.5	$	480,000
Exercisable at March 31, 2013		3,422,646		$	4.01		3.5	$	480,000