Stock Options and Warrants (Tables)

12 Months Ended

Dec. 31, 2012

Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of share-based compensation, summarizes significant ranges of outstanding stock options

The following table summarizes significant ranges of outstanding stock options under the two plans at December 31, 2012:

Range of Exercise Prices	Number of Options		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Number of Options Exercisable		Weighted Average Contractual Life		Weighted Average Exercise Price
$1.83 — 3.00		2,108,656		9.47	$	1.96		854,178		9.47	$	2.04
$3.01 — 7.00		199,941		5.44		5.40		196,298		5.36		5.42
$7.01 — 8.50		942,110		5.12		7.66		868,913		5.12		7.70
$8.51 — 32.55		132,286		1.83		12.75		132,286		1.83		12.75
		3,382,993		7.69	$	4.17		2,051,675		7.69	$	5.45

Stock Options [Member] | Employees [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of share-based payment award, fair value of the stock options granted , assumptions

The fair value of the stock options at the date of grant was estimated using the Black-Scholes option-pricing model, based on the following assumptions:

	2012			2011			2010
Risk-free interest rate		0.83% - 1.78	%		1.23	%		2.50	%
Expected volatility		0% - 82	%		89	%		91	%
Expected lives (years)		6 - 10			6 - 10			6 - 10
Expected dividend yield		0.00	%		0.00	%		0.00	%

Schedule of unvested stock options activity

A summary of the activity for unvested employee stock options as of December 31, and changes during the year is presented below:

	Stock Options									Weighted Average Grant Date Fair Value per Share
	2012			2011			2010			2012		2011		2010
Nonvested at January 1,		693,504			453,645			430,527		$	2.81	$	5.25	$	4.90
Granted		1,541,002			499,286			245,072			1.44		1.75		5.25
Vested		(849,113	)		(255,855	)		(132,454	)		3.69		4.90		5.25
Pre-vested forfeitures		(63,004	)		(3,572	)		(89,500	)		2.97		6.93		4.34
Nonvested at December 31,		1,322,389			693,504			453,645		$	1.57	$	2.81	$	5.25

Stock Options [Member] | Non-employees [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of share-based payment award, fair value of the stock options granted , assumptions

The fair value of the stock options at the date of grant was estimated using the Black-Scholes option-pricing model, based on the following assumptions:

	2012			2011			2010
Risk-free interest rate		0.83% - 1.78	%		1.23	%		2.50	%
Expected volatility		0% - 82	%		89	%		91	%
Expected lives (years)		6 - 10			6 - 10			6 - 10
Expected dividend yield		0.00	%		0.00	%		0.00	%

Schedule of share-based compensation stock options and warrants activity

At December 31, 2012, there was no unrecognized compensation expense related to unvested non-employee stock options. Presented below is the Company's non-employee stock option activity:

	Stock Options								Weighted Average Exercise Price
	2012			2011		2010			2012		2011		2010
Outstanding — beginning of year		143,572			142,143		142,143		$	6.17	$	6.30	$	6.37
Granted		—			1,429		56,429			—		2.94		8.54
Exercised		(1,429	)		—		—			2.94		—		—
Forfeited		—			—		—			—		—		—
Expired		—			—		(56,429	)		—		—		8.96
Outstanding — end of year		142,143			143,572		142,143			6.20		6.17		6.30
Exercisable at end of year		133,215			125,714		101,077		$	6.10	$	5.95	$	7.00
Weighted average fair value of stock options granted during the year:	$	—		$	2.94	$	6.09

Schedule of unvested stock options activity

A summary of the activity for unvested employee stock options as of December 31, and changes during the year is presented below:

	Stock Options									Weighted Average Grant Date Fair Value per Share
	2012			2011			2010			2012		2011		2010
Nonvested at January 1,		693,504			453,645			430,527		$	2.81	$	5.25	$	4.90
Granted		1,541,002			499,286			245,072			1.44		1.75		5.25
Vested		(849,113	)		(255,855	)		(132,454	)		3.69		4.90		5.25
Pre-vested forfeitures		(63,004	)		(3,572	)		(89,500	)		2.97		6.93		4.34
Nonvested at December 31,		1,322,389			693,504			453,645		$	1.57	$	2.81	$	5.25

Stock Options [Member] | Employees and Directors [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of share-based compensation stock options and warrants activity

At December 31, 2012, there remained approximately $1.8 million of unrecognized compensation expense related to unvested stock options granted to current and former employees and directors, to be recognized as expense over a weighted-average period of 1.35 years. Presented below is the Company's stock option activity for employees and directors:

	Stock Options									Weighted Average Exercise Price
	2012			2011			2010			2012		2011		2010
Outstanding — beginning of year		1,763,923			1,268,209			1,144,585		$	6.01	$	7.49	$	13.93
Granted		1,541,002			499,286			245,072			1.86		2.38		6.86
Exercised		(1,071	)		—			(31,948	)		2.80		—		4.62
Forfeited		(63,004	)		(3,572	)		(89,500	)		3.89		6.93		7.07
Outstanding — end of year		3,240,850			1,763,923			1,268,209			4.08		6.01		7.49
Exercisable at end of year		1,918,461			1,070,419			814,564		$	3.69	$	7.49	$	6.93
Weighted average fair value of stock options granted during the year:	$	1.44		$	1.75		$	5.25

Warrants [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of share-based compensation stock options and warrants activity

A summary of the Company's warrant activity and related information for the years ended December 31 are shown below.

	Warrants									Weighted Average Exercise Price
	2012			2011			2010			2012		2011		2010
Outstanding — beginning of year		7,397,415			1,294,639			2,202,654		$	5.32	$	10.29	$	10.50
Granted		285,716			6,440,000			171,429			2.06		4.48		12.60
Exercised		(5,714	)		—			(5,715	)		1.89		5.32		1.82
Forfeited		(28,571	)		—			—			1.89		—		—
Expired		(130,733	)		(337,224	)		(1,073,729	)		11.90		8.68		14.28
Outstanding — end of year		7,518,113			7,397,415			1,294,639			5.09		5.32		10.29
Exercisable at end of year		7,452,396			7,396,701			1,251,725		$	5.11	$	5.31	$	10.50
Weighted average fair value of warrants granted during the year:	$	1.22		$	2.42		$	3.85

Schedule of share-based compensation, summarizes significant ranges of outstanding stock options

The following table summarizes additional information concerning warrants outstanding and exercisable at December 31, 2012:

	Warrants Outstanding
Range of Exercise Prices	Number of Shares		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Warrants Number of Shares Exercisable		Exercisable Weighted Average Exercise Price
$1.82 — 2.50		360,003		2.41	$	2.00		294,286	$	1.97
$2.51 — 5.50		6,497,190		3.58		4.49		6,497,190		4.49
$5.51 — 11.50		23,461		2.00		6.18		23,461		6.18
$11.51 — 24.50		637,459		1.96		12.90		637,459		12.90
		7,518,113		3.38	$	5.09		7,452,396	$	5.11