Stock-based Compensation (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2012

Dec. 31, 2011

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

Summary of stock-based compensation expense

	Three months ended
	September 30, 2012			September 30, 2011
Stock option compensation expense for employees and directors	$	277		$	225
Restricted stock expense		0			12
Equity awards for nonemployees issued for services		(3	)		0
Total stock-based compensation expense	$	274		$	237
	Nine months ended
	September 30, 2012			September 30, 2011
Stock option compensation expense for employees and directors	$	833		$	2,303
Restricted stock expense		0			48
Equity awards for nonemployees issued for services		24			289
Total stock-based compensation expense	$	857		$	2,640

	2011		2010
Stock option compensation expense for employees and directors	$	2,607,210	$	833,713
Restricted stock expense		48,000		72,000
Equity awards for nonemployees issued for services		244,740		86,828
Total stock-based compensation expense	$	2,899,950	$	992,541

Summary of stock option activity

	Number of shares			Weighted- average exercise price		Weighted- average remaining contractual term (in years)		Aggregate intrinsic value
Outstanding at December 31, 2011		13,608,500		$	0.77		8.4	$	0
Granted		550,000		$	0.41
Exercised		0		$	0
Forfeited		(496,250	)	$	0.61
Outstanding at September 30, 2012		13,662,250		$	0.76		7.5	$	0
Exercisable at September 30, 2012		10,838,157		$	0.66		7.4	$	0

	Non-vested Options
	Number of Shares			Weighted- Average Fair Value
Non-vested at January 1, 2010		677,000		$	0.36
Granted		2,870,000			0.53
Vested		(1,497,384	)		0.49
Forfeited		—			—
Non-vested at December 31, 2010		2,049,616		$	0.50
Granted		9,628,000			0.72
Vested		(5,569,043	)		0.77
Forfeited		(1,096,500	)		0.76
Non-vested at December 31, 2011		5,012,073		$	0.41

Details of fair value option award

	September 30, 2012			September 30, 2011
Expected life (years)		6.0 years			6.0 years
Interest rate		2.3	%		2.4	%
Dividend yield		0			0
Volatility		60	%		61	%

	Number of shares			Weighted- average exercise price		Weighted- average remaining contractual term (in years)		Aggregate intrinsic value
Outstanding at January 1, 2010		2,807,000		$	0.77		7.35	$	1,082,800
Granted		2,870,000			0.95
Exercised		—			—
Forfeited		—			—
Outstanding at December 31, 2010		5,677,000		$	0.86		7.46	$	—
Granted		9,628,000		$	0.72
Exercised		(600,000	)	$	0.75				318,000
Forfeited		(1,096,500	)	$	0.77
Outstanding at December 31, 2011		13,608,500		$	0.77		8.36	$	—
Exercisable at December 31, 2011		8,596,427		$	0.80		8.00	$	—

Summary the Company's restricted stock activity

	Non-vested Options
	Number of Shares			Weighted- Average Fair Value
Non-vested at January 1, 2010		300,000		$	0.48
Granted		—			—
Vested		(150,000	)		0.48
Forfeited		—			—
Non-vested at December 31, 2010		150,000		$	0.48
Granted		—			—
Vested		(150,000	)		0.48
Forfeited		—			—
Non-vested at December 31, 2011		—		$	—

Non Vested Stock Options [Member]

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

Summary of stock option activity

	2011			2010
Expected life (years)		5.4 years			5.1 years
Interest rate		2.1	%		2.0	%
Dividend yield		—			—
Volatility		62	%		64	%