Stock Options, Stock Purchase Plan and Warrants (Details 2) (USD $)	12 Months Ended
Dec. 31, 2012
Summarizes information about our options outstanding
Outstanding number of options	5,777,214
Weighted average remaining contractual life outstanding	3 years
Outstanding average exercise price	$ 1.02
Exercisable, number of options	4,074,834
Weighted average remaining contractual life exercisable	2 years 7 months 6 days
Exercisable, average exercise Price	$ 0.79
Range One [Member]
Summarizes information about our options outstanding
Price Range, Minimum	$ 0.00
Price Range, Maximum	$ 0.30
Outstanding number of options	975,000
Weighted average remaining contractual life outstanding	1 year 10 months 24 days
Outstanding average exercise price	$ 0.25
Exercisable, number of options	975,000
Weighted average remaining contractual life exercisable	1 year 10 months 24 days
Exercisable, average exercise Price	$ 0.25
Range Two [Member]
Summarizes information about our options outstanding
Price Range, Minimum	$ 0.31
Price Range, Maximum	$ 0.46
Outstanding number of options	5,000
Weighted average remaining contractual life outstanding	3 years 2 months 12 days
Outstanding average exercise price	$ 0.31
Exercisable, number of options	5,000
Weighted average remaining contractual life exercisable	3 years 2 months 12 days
Exercisable, average exercise Price	$ 0.31
Range Three [Member]
Summarizes information about our options outstanding
Price Range, Minimum	$ 0.47
Price Range, Maximum	$ 0.61
Outstanding number of options	101,500
Weighted average remaining contractual life outstanding	3 years 3 months 18 days
Outstanding average exercise price	$ 0.50
Exercisable, number of options	101,500
Weighted average remaining contractual life exercisable	3 years 3 months 18 days
Exercisable, average exercise Price	$ 0.50
Range Four [Member]
Summarizes information about our options outstanding
Price Range, Minimum	$ 0.62
Price Range, Maximum	$ 0.83
Outstanding number of options	1,988,674
Weighted average remaining contractual life outstanding	2 years 10 months 24 days
Outstanding average exercise price	$ 0.77
Exercisable, number of options	1,973,922
Weighted average remaining contractual life exercisable	2 years 10 months 24 days
Exercisable, average exercise Price	$ 0.77
Range Five [Member]
Summarizes information about our options outstanding
Price Range, Minimum	$ 0.84
Price Range, Maximum	$ 1.08
Outstanding number of options	254,497
Weighted average remaining contractual life outstanding	1 year 10 months 24 days
Outstanding average exercise price	$ 1.03
Exercisable, number of options	216,622
Weighted average remaining contractual life exercisable	1 year 9 months 18 days
Exercisable, average exercise Price	$ 1.03
Range Six [Member]
Summarizes information about our options outstanding
Price Range, Minimum	$ 1.09
Price Range, Maximum	$ 1.47
Outstanding number of options	1,111,918
Weighted average remaining contractual life outstanding	3 years 6 months
Outstanding average exercise price	$ 1.42
Exercisable, number of options	511,790
Weighted average remaining contractual life exercisable	3 years 3 months 18 days
Exercisable, average exercise Price	$ 1.43
Range Seven [Member]
Summarizes information about our options outstanding
Price Range, Minimum	$ 1.48
Price Range, Maximum	$ 1.84
Outstanding number of options	1,340,625
Weighted average remaining contractual life outstanding	3 years 8 months 12 days
Outstanding average exercise price	$ 1.67
Exercisable, number of options	291,000
Weighted average remaining contractual life exercisable	2 years 8 months 12 days
Exercisable, average exercise Price	$ 1.58

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

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- Definition

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

+ References

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

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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 Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

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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

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-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a, b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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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.

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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

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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