Stock-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at December 31, 2012 (in shares)	1,340
Shares, Granted (in shares)	0
Shares, Exercised (in shares)	0
Shares, Forfeited (in shares)	(167)
Shares, Outstanding at September 30, 2013 (in shares)	1,173
Shares, Exercisable at September 30, 2013 (in shares)	903
Weighted-Average Exercise Price, Outstanding at December 31, 2012 (in dollars per share)	$ 0.017
Weighted-Average Exercise Price, Granted (in dollars per share)	$ 0
Weighted-Average Exercise Price, Exercised (in dollars per share)	$ 0
Weighted-Average Exercise Price, Forfeited (in dollars per share)	$ 0
Weighted-Average Exercise Price, Outstanding at September 30, 2013 (in dollars per share)	$ 0.017
Weighted-Average Exercise Price, Exercisable at September 30, 2013 (in dollars per share)	$ 0.018
Aggregate Intrinsic Value, Outstanding at September 30, 2013	$ 0
Aggregate Intrinsic Value, Exercisable at September 30, 2013	$ 0
Weighted-Average Contractual Life Remaining in Years, Outstanding at September 30, 2013	7 years 10 months 24 days
Weighted-Average Contractual Life Remaining in Years, Exercisable at September 30, 2013	7 years 9 months 18 days