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Summary of Significant Accounting Policies (Details 4) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Reconciliation of the numerators and denominators used in computing basic and diluted net income per share |  |  |  |
Net income (loss) | $ 3,802,983 | $ (5,137,997) | $ (17,269,166) | $ (12,242,585)
Accretion of Series G Preferred Stock |  |  |  | (1,987,977)
Fair market value of warrants issued to Series G Preferred Stock stockholders |  | (906,150) |  | (906,150)
Cumulative dividends on Series G Preferred Stock |  | (105,000) | (10,000) | (343,479)
Numerator, basic and diluted net income (loss) available to stockholders | $ 3,802,983 | $ (5,242,997) | $ (17,279,166) | $ (15,480,191)
Shares used in computation - basic: |  |  |  |
Weighted average common shares outstanding | 74,087,794 | 72,793,773 | 73,498,034 | 69,292,452
Additional shares from participating securities per the two class method | 4,456,597 |  |  |
Common shares outstanding for basic | 78,544,391 | 72,793,773 | 73,498,034 | 69,292,452
Shares used in computation - diluted: |  |  |  |
Common shares outstanding for basic | 78,544,391 | 72,793,773 | 73,498,034 | 69,292,452
Dilutive effect of potential common shares outstanding | 2,896,457 |  |  |
Shares used in computing diluted net income per share | 81,440,848 | 72,793,773 | 73,498,034 | 69,292,452
Net income (loss) per share ? basic | $ 0.05 | $ (0.07) | $ (0.24) | $ (0.22)
Net income (loss) per share ? diluted | $ 0.05 | $ (0.07) | $ (0.24) | $ (0.22)

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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 36, 37, 38 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.23) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -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 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 + Details
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