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Organization and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2013
Reconciliation of Numerators and Denominators used in Computing Basic and Diluted Net Income Per Share | The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income per share:
|  | 12 Month Period Ended December 31, 2013 |  |  | 12 Month Period Ended December 31, 2012 |  |  | 12 Month Period Ended December 31, 2011 |
Net loss |  | $ | (10,741,272 | ) |  | $ | (18,184,113 | ) |  | $ | (16,225,308 | )
Accretion of Series G Preferred Stock |  |  | — |  |  |  | — |  |  |  | (1,987,977 | )
Cumulative dividends on Series G Preferred Stock |  |  | — |  |  |  | (10,000 | ) |  |  | (409,035 | )
Fair market value of warrants issued to Series G Preferred Stock stockholders |  |  | — |  |  |  | — |  |  |  | (906,150 | )
Undeclared cumulative dividends on Series G Preferred Stock in arrears |  |  | — |  |  |  | — |  |  |  | (5,000 | )
Numerator, basic and diluted net loss available to stockholders |  | $ | (10,741,272 | ) |  | $ | (18,194,113 | ) |  | $ | (19,533,470 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Shares used in computation – basic: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 80,128,827 |  |  |  | 73,889,112 |  |  |  | 70,179,935 |
Shares used in computation – diluted: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 80,128,827 |  |  |  | 73,889,112 |  |  |  | 70,179,935 |
Dilutive effect of options, warrants and convertible instruments outstanding |  |  | — |  |  |  | — |  |  |  | — |
Shares used in computing diluted net loss per share |  |  | 80,128,827 |  |  |  | 73,889,112 |  |  |  | 70,179,935 |
Net loss per share – basic and diluted |  | $ | (0.13 | ) |  | $ | (0.25 | ) |  | $ | (0.28 | )
In the Money Potential Common Shares [Member] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The potential common shares, in the table following, represent potential common shares calculated using the treasury stock method from outstanding options and warrants that were excluded from the calculation of Diluted EPS:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Average market price during the period |  | $ | 2.96 |  |  | $ | 3.20 |  |  | $ | 2.98 |
In the money potential common shares from options excluded |  |  | 146,162 |  |  |  | 275,101 |  |  |  | 129,793 |
In the money potential common shares from warrants excluded |  |  | 92,363 |  |  |  | 1,129,973 |  |  |  | 959,521 |
Convertible Preferred Stock Excluded from EPS [Member] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | Potential common shares from outstanding Convertible Preferred Stock calculated per the if-converted basis having an anti-dilutive effect on diluted earnings per share were excluded from potential common shares as follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Potential common shares from Preferred Stock excluded from computation of diluted earnings per share |  |  | 32,400 |  |  |  | 206,400 |  |  |  | 346,400 |
Unvested Restricted Stock Awards Excluded from EPS [Member] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The weighted average equivalent common shares relating to our unvested restricted stock awards that were excluded from potential common shares used in the earning per share calculation due to having an anti-dilutive effect are:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Excluded unvested restricted stock awards |  |  | 152,026 |  |  |  | 177,830 |  |  |  | 90,033 |
Out of Money Potential Common Shares [Member] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | Potential common shares from out-of-the-money options and warrants were also excluded from the computation of diluted earnings per share because calculation of the associated potential common shares has an anti-dilutive effect. The following table lists options and warrants that were excluded from diluted EPS.
|  | 2013 |  |  | 2012 |  |  | 2011 |
Out of the money options and warrants excluded: |  |  |  |  |  |  |  |  |  |  |  |
Stock Options with an exercise price of $3.25 per share |  |  | 100,000 |  |  |  | — |  |  |  | — |
Stock Options with an exercise price of $3.30 per share |  |  | — |  |  |  | 100,000 |  |  |  | — |
Stock Options with an exercise price of $3.40 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 |  |  |  | 495,000 |
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 |  |  |  | 20,000 |  |  |  | — |
Stock Options with an exercise price of $4.00 per share |  |  | 52,500 |  |  |  | 52,500 |  |  |  | 52,500 |
Stock Options with an exercise price of $5.00 per share |  |  | — |  |  |  | 200,000 |  |  |  | 650,000 |
Stock Options with an exercise price of $7.00 per share |  |  | — |  |  |  | 100,000 |  |  |  | 100,000 |
Warrants with an exercise price of $3.60 per share |  |  | 1,562,500 |  |  |  | 1,562,500 |  |  |  | — |
Warrants with an exercise price of $4.32 per share |  |  | — |  |  |  | — |  |  |  | 1,302,083 |
Warrants with an exercise price of $5.25 per share |  |  | — |  |  |  | 100,000 |  |  |  | 100,000 |
Total anti-dilutive warrants and options excluded from EPS |  |  | 2,220,600 |  |  |  | 3,533,600 |  |  |  | 3,896,153 |

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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 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: 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 + Details
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