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Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
Reconciliation of the numerators and denominators used in computing basic and diluted net income per share |
|  | Three Months Ended |
|  | March 31, 2013 |  |  | March 31, 2012 |
Net income (loss) |  | $ | (9,665,379 | ) |  | $ | (5,481,799 | )
Cumulative dividends on Series G Preferred Stock |  |  | — |  |  |  | (10,000 | )
Numerator, basic and diluted net income (loss) available to stockholders |  | $ | (9,665,379 | ) |  | $ | (5,491,799 | )
Denominator: |  |  |  |  |  |  |  |
Shares used in computation – basic: |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 77,344,388 |  |  |  | 73,165,136 |
Shares used in computation – diluted: |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 77,344,388 |  |  |  | 73,165,136 |
Dilutive effect of potential common shares outstanding |  |  | — |  |  |  | — |
Shares used in computing diluted net income per share |  |  | 77,344,388 |  |  |  | 73,165,136 |
Net income (loss) per share – basic |  | $ | (0.12 | ) |  | $ | (0.08 | )
Net income (loss) per share – diluted |  | $ | (0.12 | ) |  | $ | (0.08 | )
In the money potential common shares [Member] |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
Schedule of antidilutive securities excluded from computation of earnings per share |
|  | Three Months Ended |
|  | March 31, 2013 |  |  | March 31, 2012 |
Average market price during the period |  | $ | 3.24 |  |  | $ | 3.18 |
In the money potential common shares from options excluded |  |  | 396,105 |  |  |  | 269,699 |
In the money potential common shares from warrants excluded |  |  | 555,877 |  |  |  | 1,202,529 |
Out of money potential common shares [Member] |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
Schedule of antidilutive securities excluded from computation of earnings per share |
|  | Three Months Ended |
|  | March 31, 2013 |  |  | March 31, 2012 |
Out of the money options and warrants excluded: |  |  |  |  |  |  |  |
Stock options with an exercise price of $3.30 per share |  |  | 100,000 |  |  |  | — |
Stock options with an exercise price of $3.43 per share |  |  | 40,000 |  |  |  | — |
Stock options with an exercise price of $3.50 per share |  |  | 345,000 |  |  |  | 245,000 |
Stock options with an exercise price of $3.51 per share |  |  | 959,500 |  |  |  | 984,670 |
Stock options with an exercise price of $3.53 per share |  |  | 194,100 |  |  |  | 211,900 |
Stock options with an exercise price of $3.90 per share |  |  | 20,000 |  |  |  | — |
Stock options with an exercise price of $4.00 per share |  |  | 52,500 |  |  |  | 52,500 |
Stock options with an exercise price of $5.00 per share |  |  | 200,000 |  |  |  | 400,000 |
Stock options with an exercise price of $7.00 per share |  |  | 100,000 |  |  |  | 100,000 |
Warrants with an exercise price of $4.32 per share |  |  | — |  |  |  | 1,302,083 |
Warrants with an exercise price of $3.60 per share |  |  | 1,562,500 |  |  |  | — |
Warrants with an exercise price of $5.25 per share |  |  | — |  |  |  | 100,000 |
Total anti-dilutive warrants and options excluded from EPS |  |  | 3,573,600 |  |  |  | 3,396,153 |
Convertible preferred stock excluded from EPS [Member] |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
Schedule of antidilutive securities excluded from computation of earnings per share |
|  | Three Months Ended |
|  | March 31, 2013 |  |  | March 31, 2012 |
Potential common shares from Convertible Preferred Stock excluded from EPS |  |  | 206,400 |  |  |  | 346,400 |
Unvested restricted stock awards excluded from EPS [Member] |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
Schedule of antidilutive securities excluded from computation of earnings per share |
|  | Three Months Ended |
|  | March 31, 2013 |  |  | March 31, 2012 |
Potential common shares from unvested restricted stock awards excluded from EPS |  |  | 505,503 |  |  |  | 495,304 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph 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. + Details
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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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