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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
shares in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Operating Leases, Future Minimum Payments Due $ 113,995   $ 151,993    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 91.7 85.2 93.9 90.3 6.6
Minimum [Member]          
Property, Plant and Equipment, Useful Life     3 years    
Maximum [Member]          
Property, Plant and Equipment, Useful Life     5 years