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Note 9 - Income Taxes (Details) - Schedule of the Aggregate Dollar and Per Share Effects of Tax Exemption - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Schedule of the Aggregate Dollar and Per Share Effects of Tax Exemption [Abstract]    
Aggregate dollar effect of tax holiday $ 1,174,860 $ 2,045,545