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Net Loss Per Common Share (Reconciliation of Net Loss Per Share) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Numerator: |  |  |  |  |  |  |  |  |  |  |
Net loss | $ (5,455,150) | $ (8,994,179) | $ (8,980,346) | $ (7,332,598) | $ (2,502,729) | $ (1,974,414) | $ (4,748,426) | $ (2,380,662) | $ (30,762,273) | $ (11,606,231) | $ (60,326,419)
Preferred stock dividends |  |  |  |  |  |  |  |  | (4,370,247) | (4,696,766) | (1,276,902)
NET LOSS AVAILABLE TO COMMON SHAREHOLDERS | $ (6,524,609) | $ (10,086,692) | $ (10,082,744) | $ (8,438,475) | $ (3,613,566) | $ (3,130,564) | $ (5,945,297) | $ (3,613,570) | $ (35,132,520) | $ (16,302,997) | $ (61,603,321)
Denominator: |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding - basic |  |  |  |  |  |  |  |  | 40,497,098 | 24,640,774 | 19,383,007
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |
Diluted weighted average shares outstanding |  |  |  |  |  |  |  |  | 40,497,098 | 24,640,774 | 19,383,007
Net loss per common share: |  |  |  |  |  |  |  |  |  |  |
Basic earnings per common share | $ (0.13) | $ (0.24) | $ (0.26) | $ (0.24) | $ (0.11) | $ (0.12) | $ (0.26) | $ (0.17) | $ (0.87) | $ (0.66) | $ (3.18)
Diluted earnings per common share | $ (0.13) | $ (0.24) | $ (0.26) | $ (0.24) | $ (0.11) | $ (0.12) | $ (0.26) | $ (0.17) | $ (0.87) | $ (0.66) | $ (3.18)

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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-Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 36, 37, 38 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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