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Income Taxes (Details 2) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Summary of reconciliation of Effective income tax rate and statutory federal income tax rate |  |  |
Amounts at statutory tax rates | 34.00% | 34.00% | 34.00%
Non-deductible loss on revaluation of embedded conversion features and extinguishment of convertible debt |  |  | (29.00%)
Foreign losses taxed at different rates |  | 1.00% | 2.00%
Stock-based compensation | (3.00%) | (7.00%) |
Other | (1.00%) |  |
Total | 30.00% | 28.00% | 7.00%
Valuation allowance | (31.00%) | (29.00%) | (7.00%)
Effective tax rate | (1.00%) | (1.00%) |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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