Stock-Based Compensation (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares (in shares)	1,173
Options Outstanding, Weighted - Average Remaining Life (in years)	7 years 8 months 12 days
Options Outstanding, Weighted - Average Exercise Price (in dollars per share)	$ 0.017
Options Exercisable, Number of Shares (in shares)	938
Options Exercisable, Weighted - Average Exercise Price (in dollars per share)	$ 0.018
Stock Option Plan Exercise Range 0.008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares (in shares)	200
Options Outstanding, Weighted - Average Remaining Life (in years)	8 years 8 months 12 days
Options Outstanding, Weighted - Average Exercise Price (in dollars per share)	$ 0.008
Options Exercisable, Number of Shares (in shares)	52
Options Exercisable, Weighted - Average Exercise Price (in dollars per share)	$ 0.008
Stock Option Plan Exercise Range 0.014 to 0.017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares (in shares)	884
Options Outstanding, Weighted - Average Remaining Life (in years)	7 years 6 months
Options Outstanding, Weighted - Average Exercise Price (in dollars per share)	$ 0.015
Options Exercisable, Number of Shares (in shares)	797
Options Exercisable, Weighted - Average Exercise Price (in dollars per share)	$ 0.016
Stock Option Plan Exercise Range 0.050 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares (in shares)	89
Options Outstanding, Weighted - Average Remaining Life (in years)	7 years 2 months 12 days
Options Outstanding, Weighted - Average Exercise Price (in dollars per share)	$ 0.047
Options Exercisable, Number of Shares (in shares)	89
Options Exercisable, Weighted - Average Exercise Price (in dollars per share)	$ 0.047