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Note 5 - Notes Receivable (Details Textual) - USD ($)
1 Months Ended
Oct. 31, 2018
Sep. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Oct. 31, 2017
Jul. 31, 2017
Advance to Helomics [Member]            
Payments to Acquire Notes Receivable         $ 600,000  
Advances to De Lage Landen [Member]            
Payments to Acquire Notes Receivable   $ 60,000   $ 67,512    
Lease to Purchase Equipment, Down Payment, Percentage       50.00%    
Advances to De Lage Landen [Member] | Subsequent Event [Member]            
Payments to Acquire Notes Receivable $ 907,500          
CytoBioscience [Member] | Promissory Notes Receivable [Member]            
Notes Receivable, Interest Rate, Stated Percentage     8.00%     8.00%
Financing Receivable, Net, Total     $ 1,112,524 $ 1,070,000    
Notes Receivable, Term     2 years      
Helomics Holding Corp. [Member]            
Financing Receivable, Net, Total   $ 163,468        
Share Exchange Agreement, Outstanding Receivables, Amount Converted     $ 500,000      
Share Exchange Agreement, Shares Received Upon Conversion of Receivables     833,333      
Share Exchange Agreement, Convertible Notes, Percent of Stock     5.00%      
Investment, Ownership Percent     25.00%