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Note 7 - Income Taxes - Effective Income Tax Rate Reconciliation (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Tax on net income at federal statutory rate 21.00% 21.00%
State tax expense 39.00% 0.00%
Change in valuation allowance 35.00% (5.00%)
Stock-based compensation 538.00% 74.00%
Section 162(m) limitation on executive compensation (35.00%) (17.00%)
Book loss on equity method investment 0.00% (5.00%)
Fair value change in warrant liability 127.00% (82.00%)
Gain on stock acquisition 0.00% 64.00%
Transaction costs (6.00%) (4.00%)
Fair value change in contingent consideration (81.00%) 0.00%
Tax credits 12.00% 5.00%
Expired net operating losses (100.00%) (5.00%)
Other (3.00%) 1.00%
Total 547.00% 47.00%