Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

Stockholders' Equity [Abstract]

Summary of carrying amount of securities and other consideration issuable pursuant to the original terms in excess of the fair value of all securities

Preferred stock redemption	Carrying amount of Preferred Stock		Fair value as of May 4, 2011		Change of value as of May 4, 2011
Series B—Preferred Stock		8,000,000		5,066,667		2,933,333
Series C—Preferred Stock		2,000,000		1,266,667		733,333
Series E—Preferred Stock		8,000,000		6,080,000		1,920,000
Preferred stock redemption		18,000,000		12,413,334		5,586,666

Summary of stock option activity

	Stock Options
	Number of Shares			Exercise Price Per Share	Weighted- Average Exercise Price Per Share
Outstanding at January 1, 2010		4,787,085		$0.17 – $1.09	$	0.41
Granted		2,565,000		0.13 – 0.36		0.31
Exercised		(3,333	)	0.17		0.17
Canceled/forfeited		(2,925,417	)	0.13 – 1.09		0.47
Outstanding at December 31, 2011		4,423,335		$0.13 – $0.62	$	0.31
Granted		2,105,000		0.11 – 0.21		0.11
Canceled/forfeited		(2,998,250	)	0.11 – 0.49		0.29
Outstanding at December 31, 2012		3,530,085		$0.11 – $0.62	$	0.24

Options outstanding

Range of Exercise Prices	Outstanding at December 31, 2012		Weighted- Average Remaining Contractual Life		Weighted- Average Exercise Price		Exercisable at December 31, 2012		Weighted- Average Exercise Price
$0.01 – 0.19		1,485,000		6.0	$	0.12		370,278	$	0.16
0.20 – 0.29		886,335		4.2	$	0.25		626,613	$	0.25
0.30 – 0.39		772,500		4.3	$	0.35		576,528	$	0.35
0.40 – 0.49		376,250		2.1	$	0.46		376,250	$	0.46
0.60 – 0.69		10,000		1.0	$	0.62		10,000	$	0.62
		3,530,085		4.8	$	0.24		1,959,669	$	0.31