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Accounting Policies, by Policy (Policies)
 3 Months Ended
Mar. 31, 2014
Accounting Policies [Abstract]  
Use of Estimates, Policy [Policy Text Block]

Use of Estimates


The preparation of condensed financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. We evaluate our estimates on an ongoing basis, including those related to clinical trial accruals, income taxes and stock-based compensation. We base our estimates on historical experience and on assumptions that it believes to be reasonable under the circumstances, the results of which form the basis of making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ materially from these estimates under different assumptions or conditions.
Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and Cash Equivalents


We consider all highly liquid investments with a maturity from the date of purchase of less than three months to be cash equivalents. We had cash of $57.5 million and $72.3 million at March 31, 2014 and December 31, 2013, respectively. There were no cash equivalents as of both dates. Our bank accounts have been placed under a control agreement in accordance with the April 2011 convertible note financing (see Note 4).
Liquidity Disclosure [Policy Text Block]

We had cash of $57.5 million and $72.3 million at March 31, 2014 and December 31, 2013, respectively.
Earnings Per Share, Policy [Policy Text Block]

Earnings Per Share


Basic earnings per share (“EPS”) is calculated by dividing the net loss by the weighted-average number of common shares outstanding for the period, without consideration of common share equivalents. Diluted EPS is computed by dividing the net loss by the weighted-average number of common shares and common share equivalents outstanding for the period determined using the treasury stock method. For purposes of this calculation, stock options, warrants and common stock underlying convertible notes are considered to be common stock equivalents and are only included in the calculation of diluted EPS when their effect is dilutive.


Because we have incurred a net loss for both periods presented in the unaudited condensed statements of operations, outstanding stock options, warrants and common stock underlying convertible notes are not included in the computation of net loss per share because their effect would be anti-dilutive.


The following table includes the number of outstanding stock options, warrants and common stock underlying convertible notes not included in the computation for the three months ended March 31, 2014 and 2013 (in thousands):


   

Three Months Ended March 31,

 
   

2014

   

2013

 
                 

Stock options outstanding

    7,273       4,461  

Warrants outstanding

    3,825       4,052  

Common stock underlying convertible notes outstanding

    6,385       6,016  
Comprehensive Income, Policy [Policy Text Block]

Comprehensive Income (Loss)


Comprehensive income (loss) is defined as the change in equity during a period from transactions and other events and circumstances from non-owner sources. Our comprehensive net loss for both periods presented was comprised solely of its net loss and there were no other changes in equity from non-owner sources.
New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements


We do not expect that the adoption of any recently issued accounting pronouncements would have a significant impact on our results of operations, financial condition or cash flow.