Annual report pursuant to Section 13 and 15(d)

Note 2 - Liquidity (Details Textual)

v3.20.1
Note 2 - Liquidity (Details Textual) - USD ($)
 1 Months Ended 2 Months Ended 12 Months Ended
Nov. 27, 2019
Jun. 18, 2019
Feb. 29, 2020
Jan. 31, 2020
Dec. 31, 2019
Jun. 30, 2019
Nov. 30, 2017
Jan. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Proceeds from Issuance of Common Stock         $ 1,100,000       $ 7,086,915 $ 3,000,200
Prepaid Expenses and Other Current Assets [Member]                    
Common Stock, Share Subscribed but Unissued, Subscriptions Receivable         $ 812,000       812,000  
Underwritten Public Offering [Member]                    
Stock Issued During Period, Shares, New Issues           8,000,000        
Shares Issued, Price Per Share   $ 0.75       $ 0.75        
Proceeds from Issuance of Common Stock   $ 5,555,000       $ 5,555,000        
Underwritten Public Offering [Member] | John K. Scott, Jr. [Member]                    
Stock Issued During Period, Shares, New Issues           4,000,000        
Shares Issued, Price Per Share           $ 0.75        
Underwritten Public Offering [Member] | Underwriter [Member]                    
Stock Issued During Period, Shares, New Issues   4,000,000       4,000,000        
Shares Issued, Price Per Share   $ 0.69375       $ 0.69375        
Subsequent Event [Member]                    
Stock Issued During Period, Shares, New Issues               2,100,000    
Proceeds from Issuance of Common Stock       $ 812,000       $ 1,900,000    
Increase in Additional Working Capital     $ 9,500,000              
Subsequent Event [Member] | Investor [Member]                    
Litigation Settlement, Amount Awarded from Other Party     $ 4,300,000              
Litigation Settlement Option Timeline     45 days              
Litigation Repurchase Option Premium     10.00%              
Litigation Repurchase Option Discount     10.00%              
Stock Issued During Period, Shares, New Issues     4,000,000              
Proceeds from Issuance of Common Stock     $ 3,400,000              
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  
CRG Loan Agreement, Ohio Case [Member] | Subsequent Event [Member]                    
Litigation Repurchase Option Discount     10.00%              
Ohio Court of Common Pleas [Member]                    
Litigation Settlement, Amount Awarded from Other Party $ 4,300,000                  
Ohio Court of Common Pleas [Member] | Subsequent Event [Member]                    
Proceeds From Sale Of Judgment     $ 4,200,000              
Litigation Settlement Option Timeline     45 days              
Litigation Repurchase Option Premium     10.00%