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Note 16 - Income Taxes - Differences Between the Expected Federal Tax Benefit and Actual Tax Provision (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Expected federal tax benefit (34.00%) (34.00%) (34.00%)
Permanent items 5.60% 0.40% 0.10%
Net operating loss utilized or expired 0.00% 0.00% 0.00%
Increase in valuation allowance and others 28.40% 33.60% 33.90%
Effective tax rate 0.00% 0.00% 0.00%