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Note 9 - Income Taxes - Reconciliation of Income Tax Rate (Details) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Federal tax benefit at statutory rate | (21.00%) | (21.00%)
State tax, net of Federal benefit | (2.50%) | (2.90%)
Goodwill impairment |  | 7.70%
Orphan drug credit | 25.30% | (1.30%)
Change in valuation allowance | (7.50%) | 15.20%
Stock compensation | 8.60% |
Other | 0.10% |
Total provision | 3.00% | (2.30%)

X
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to goodwill impairment. + References No definition available. + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to orphan drug credits. + References No definition available. + Details
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