Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Liquidity (Details Textual)

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Note 2 - Liquidity (Details Textual) - USD ($)
shares in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Apr. 30, 2020
Nov. 27, 2019
Feb. 29, 2020
Jan. 31, 2020
Dec. 31, 2019
Nov. 30, 2017
Jun. 30, 2020
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Stock Issued During Period, Shares, New Issues (in shares)         2.1          
Proceeds from Issuance of Common Stock       $ 812,000 $ 1,900,000     $ 850,000 $ 50,300 $ 1,100,000
Common Stock, Share Subscribed but Unissued, Subscriptions Receivable             912,500  
Increase in Additional Working Capital     $ 2,500,000              
Subsequent Event [Member]                    
Proceeds from Paycheck Protection Program Under CARES Act $ 366,000                  
Common Stock Subscriptions Receivable [Member]                    
Common Stock, Share Subscribed but Unissued, Subscriptions Receivable               913,000    
Forecast [Member]                    
Increase in Additional Working Capital             $ 5,100,000      
Investor [Member]                    
Litigation Settlement, Amount Awarded from Other Party     $ 4,300,000              
Stock Issued During Period, Shares, New Issues (in shares)     4.0              
Proceeds from Issuance of Common Stock     $ 3,400,000         850,000    
Investor [Member] | Forecast [Member]                    
Proceeds from Issuance of Common Stock             $ 1,700,000      
Accounts and Other Receivables [Member]                    
Common Stock, Share Subscribed but Unissued, Subscriptions Receivable         $ 812,000     1,700,000   $ 812,000
Platinum-Montaur Life Sciences LLC Litigation [Member]                    
Loss Contingency, Damages Sought, Value           $ 1,900,000        
CRG Loan Agreement, Ohio Case [Member]                    
Loss Contingency, Damages Sought, Value               $ 4,300,000    
Litigation Repurchase Option Discount     16.00%              
Ohio Court of Common Pleas [Member]                    
Litigation Settlement, Amount Awarded from Other Party   $ 4,300,000                
Proceeds From Sale Of Judgment     $ 4,200,000              
Litigation Settlement Option Timeline (Day)     1150 years 250 days              
Litigation Repurchase Option Premium     4.20%