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Note 5 - Notes Receivable (Details Textual) - USD ($)
1 Months Ended 2 Months Ended
Apr. 30, 2019
Mar. 31, 2019
Feb. 28, 2019
Dec. 31, 2018
Mar. 31, 2018
Shelf Registration [Member] | Subsequent Event [Member]          
Financing Receivable, before Allowance for Credit Loss, Total $ 2,140,013        
Proceeds from Issuance or Sale of Equity, Total 250,000        
CytoBioscience [Member] | Promissory Notes Receivable [Member]          
Financing Receivable, after Allowance for Credit Loss, Total         $ 1,112,524
Notes Receivable, Interest Rate, Stated Percentage         8.00%
Helomics Holding Corp. [Member]          
Financing Receivable, before Allowance for Credit Loss, Total       $ 1,165,013  
Interest Receivable       $ 39,092  
Payments to Acquire Notes Receivable     $ 305,000    
Helomics Holding Corp. [Member] | Subsequent Event [Member]          
Increase (Decrease) in Notes Payable, Current, Total $ (1,190,967)        
Helomics Holding Corp. [Member] | Shelf Registration [Member]          
Payments to Acquire Notes Receivable   $ 420,000