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Note 6 - Operating Leases: Maturities of the lease liability (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Notes to Financial Statements    
2019 $ 42,000  
2020 42,000  
2021 42,000  
2022 42,000  
2023 42,000  
Thereafter 210,000  
    Total future minimum lease payments 420,000  
Less: amount representing interest (165,801)  
    Present value of future payments 254,199  
Operating lease liability, current portion 17,362 $ 16,935
Operating lease liability, net of current portion $ 236,837 $ 241,341