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Note 4 - Fair Value of Financial Instruments - Summary of Financial Instruments (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Reported Value Measurement [Member]    
Revolving line of credit $ 500,000  
Revolving line of credit   $ 500,000
Reported Value Measurement [Member] | Distributor [Member]    
Note receivable 1,184,837 1,282,072
Reported Value Measurement [Member] | Nutracom, LLC [Member]    
Note receivable 1,171,746 1,171,746
Reported Value Measurement [Member] | SBA CARES Act Paycheck Protection Program [Member]    
Note payable 862,000  
Estimate of Fair Value Measurement [Member]    
Revolving line of credit 500,000  
Revolving line of credit   500,000
Estimate of Fair Value Measurement [Member] | Distributor [Member]    
Note receivable 1,317,000 1,400,000
Estimate of Fair Value Measurement [Member] | Nutracom, LLC [Member]    
Note receivable 1,229,000 1,169,000
Estimate of Fair Value Measurement [Member] | SBA CARES Act Paycheck Protection Program [Member]    
Note payable 862,000  
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Revolving line of credit  
Revolving line of credit  
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Distributor [Member]    
Note receivable
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Nutracom, LLC [Member]    
Note receivable
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | SBA CARES Act Paycheck Protection Program [Member]    
Note payable 862,000  
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Revolving line of credit 500,000  
Revolving line of credit   500,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Distributor [Member]    
Note receivable 1,317,000 1,400,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Nutracom, LLC [Member]    
Note receivable
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | SBA CARES Act Paycheck Protection Program [Member]    
Note payable  
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Revolving line of credit  
Revolving line of credit  
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Distributor [Member]    
Note receivable
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Nutracom, LLC [Member]    
Note receivable 1,229,000 $ 1,169,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | SBA CARES Act Paycheck Protection Program [Member]    
Note payable