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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2017
Antidilutive securities excluded from computation of earnings per share | We did not include the following securities in the table below in the computation of diluted net loss per common share because the securities were anti-dilutive during the periods presented:
|  | For the year ended December 31, |
|  | 2017 |  | 2016 |
Warrants |  |  | 2,934,685 |  |  | 3,736,617 |
Stock options |  |  | 5,429,727 |  |  | 4,771,560 |
Total |  |  | 8,364,412 |  |  | 8,508,177 |
Employee Stock Option [Member] |
Stock-based compensation allocation | The following table summarizes stock based option compensation for the years ended December 31, 2017 and 2016 which was allocated as follows (in thousands):
|  | Year ended December 31, 2017 |  | Year ended December 31, 2016 |
Research and development |  | $ | 1,668 |  | $ | 1,219 |
General and administrative |  |  | 2,976 |  |  | 3,610 |
Stock based compensation expense included in operating expense |  |  | 4,644 |  |  | 4,829 |
Total stock based compensation expense |  |  | 4,644 |  |  | 4,829 |
Tax benefit |  |  | - |  |  | - |
Stock based compensation expense, net of tax |  | $ | 4,644 |  | $ | 4,829 |
Restricted Stock [Member] |
Stock-based compensation allocation | The following table summarizes restricted stock compensation for the years ended December 31, 2017 and 2016 which was allocated as follows (in thousands):
|  | Year ended December 31, 2017 |  | Year ended December 31, 2016 |
Research and development |  | $ | - |  | $ | 200 |
General and administrative |  |  | 1,272 |  |  | 3,232 |
Stock based compensation expense included in operating expense |  |  | 1,272 |  |  | 3,432 |
Total stock based compensation expense |  |  | 1,272 |  |  | 3,432 |
Tax benefit |  |  | - |  |  | - |
Stock based compensation expense, net of tax |  | $ | 1,272 |  | $ | 3,432 |

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