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Note 2 - Sale of Manufacturing Operations' Assets (Details Textual) - USD ($)
Jan. 01, 2019
Jan. 01, 2020
Mar. 31, 2019
Dec. 31, 2018
Lessor, Operating Lease, Term of Contract 7 years      
Lessor, Operating Lease, Renewal Term 5 years      
Nutracom, LLC [Member]        
Supply Commitment, Term 7 years      
Lessor, Operating Lease, Term of Contract 7 years      
Lessor, Operating Lease, Renewal Term 5 years      
Shares Transferred From Related Parties 99,200      
Shares Transferred From Related Parties, Value $ 540,144      
Equity Interest Issued from Related Parties as Consideration 15.00%      
Equity Interest Issued from Related Parties as Consideration, Value $ 505,000      
Nutracom, LLC [Member] | Secured Promissory Note [Member]        
Notes Receivable, Related Parties, Noncurrent $ 1,000,000   $ 858,828
Notes Receivable, Related Parties, Term 7 years      
Notes Receivable, Related Parties, Interest Rate 5.50%      
Nutracom, LLC [Member] | Unsecured Promissory Note [Member]        
Notes Receivable, Related Parties, Noncurrent $ 764,344   $ 764,344
Notes Receivable, Related Parties, Term 7 years      
Notes Receivable, Related Parties, Interest Rate 7.00%      
Notes Receivable, Interest Only Period 2 years      
Notes Receivable, Related Parties, Amortization Period 10 years      
Nutracom, LLC [Member] | Minimum [Member]        
Operating Lease, Lease Annual Income $ 193,000      
Nutracom, LLC [Member] | Minimum [Member] | Forecast [Member]        
Percentage of Annual Revenues of Non-related Parties from Equity Interest   1.00%    
Nutracom, LLC [Member] | Maximum [Member]        
Operating Lease, Lease Annual Income 410,000      
Nutracom, LLC [Member] | Maximum [Member] | Forecast [Member]        
Percentage of Annual Revenues of Non-related Parties from Equity Interest   1.25%    
Machinery and Other Equipment Sold to Nutracom [Member]        
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal 435,000      
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Inventories Sold to Nutracom [Member]        
Disposal Group, Including Discontinued Operation, Consideration 1,560,000      
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Machinery and Other Equipment Sold to Nutracom [Member]        
Disposal Group, Including Discontinued Operation, Consideration 1,000,000      
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current $ 565,000