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Note 12 - Income Taxes - Tax Rate Reconciliation (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
U.S. federal statutory rate 35.00% 35.00% 35.00%
State and local taxes, net of federal benefit 11.80% 1.40% (1.60%)
Valuation allowance 205.40% 0.00% 0.00%
Goodwill impairment 0.00% (17.10%) (51.80%)
All other, net 104.40% 1.00% 0.10%
Effective income tax rate 356.60% 20.30% (18.30%)