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Note 9 - Income Taxes	3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	NOTE 9. INCOME TAXES Benefit from income taxes for the three months ended March 31, 2015 was a result of CLL, our United Kingdom subsidiary, receiving refundable research and development tax credits. At March 31, 2015, we had a full valuation allowance recorded against our deferred tax assets. The valuation allowance was recorded due to uncertainties related to our ability to utilize the deferred tax assets; primarily consisting of certain net operating losses carried forward. The valuation allowance is based upon management’s estimates of taxable income by jurisdiction and the periods over which the deferred tax assets will be recoverable. At December 31, 2014, we had a net operating loss carry-forward of approximately $75.4 million for U.S. federal, state, and local income tax purposes. However, due to changes in our capital structure, approximately $23.9 million of this amount is available after the application of Internal Revenue Code Section 382 limitations. If not utilized, these carry-forwards will begin to expire in 2021 for federal purposes and have already started expiring for state and local purposes. At December 31, 2014, we had a foreign net operating loss carry-forward of approximately $1.6 million, denominated in British pounds and based on the exchange rate at that date, related to our operations in the United Kingdom. Based on current tax law in the United Kingdom, net operating losses may be carried forward to offset future profits of the same trade for an indefinite period of time until fully utilized. For a full discussion of the estimated restrictions on our utilization of net operating loss carry-forwards, please refer to Note 14, Income taxes, included under Item 8 of our 2014 Annual Report.

Note 9 - Income Taxes

3 Months Ended

Mar. 31, 2015

NOTE 9. INCOME TAXES

Benefit from income taxes for the three months ended March 31, 2015 was a result of CLL, our United Kingdom subsidiary, receiving refundable research and development tax credits.

At March 31, 2015, we had a full valuation allowance recorded against our deferred tax assets. The valuation allowance was recorded due to uncertainties related to our ability to utilize the deferred tax assets; primarily consisting of certain net operating losses carried forward. The valuation allowance is based upon management’s estimates of taxable income by jurisdiction and the periods over which the deferred tax assets will be recoverable.

At December 31, 2014, we had a net operating loss carry-forward of approximately $75.4 million for U.S. federal, state, and local income tax purposes. However, due to changes in our capital structure, approximately $23.9 million of this amount is available after the application of Internal Revenue Code Section 382 limitations. If not utilized, these carry-forwards will begin to expire in 2021 for federal purposes and have already started expiring for state and local purposes. At December 31, 2014, we had a foreign net operating loss carry-forward of approximately $1.6 million, denominated in British pounds and based on the exchange rate at that date, related to our operations in the United Kingdom. Based on current tax law in the United Kingdom, net operating losses may be carried forward to offset future profits of the same trade for an indefinite period of time until fully utilized. For a full discussion of the estimated restrictions on our utilization of net operating loss carry-forwards, please refer to Note 14, Income taxes, included under Item 8 of our 2014 Annual Report.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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