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Note 1 - Accounting Policies (Details Textual) - USD ($)
Jan. 01, 2019
Jun. 30, 2019
Mar. 25, 2019
Jan. 31, 2019
Dec. 31, 2018
Sep. 11, 2018
Jun. 30, 2018
Dec. 31, 2017
Operating Lease, Right-of-Use Asset   $ 337,858          
Operating Lease, Liability, Total   330,384            
Cash and Cash Equivalents, at Carrying Value, Ending Balance   1,918,721     $ 1,989,974   $ 2,764,088 $ 3,272,788
Nutracom, LLC [Member]                
Purchase Agreement, Payments Made Per Year $ 100,000              
Revolving Credit Facility [Member]                
Long-term Line of Credit, Total       $ 500,000        
Line of Credit Facility, Maximum Borrowing Capacity   $ 750,000 $ 750,000 $ 750,000   $ 750,000    
Accounting Standards Update 2016-02 [Member]                
Operating Lease, Right-of-Use Asset 451,000              
Operating Lease, Liability, Total $ 457,000