Stock-Based Compensation (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2014
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 6 months
Options Outstanding, Weighted - Average Exercise Price (in dollars per share)	$ 0.017
Options Exercisable, Number of Shares (in shares)	972
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 6 months
Options Outstanding, Weighted - Average Exercise Price (in dollars per share)	$ 0.008
Options Exercisable, Number of Shares (in shares)	65
Options Exercisable, Weighted - Average Exercise Price (in dollars per share)	$ 0.008
Stock Option Plan Exercise Range 0.014 to 0.03 [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 3 months 18 days
Options Outstanding, Weighted - Average Exercise Price (in dollars per share)	$ 0.015
Options Exercisable, Number of Shares (in shares)	818
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)	6 years 10 months 24 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

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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