Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Liquidity (Details Textual)

v3.19.2
Note 2 - Liquidity (Details Textual) - USD ($)
 1 Months Ended 6 Months Ended
Jun. 18, 2019
Dec. 31, 2017
Nov. 30, 2017
Jun. 30, 2019
Jun. 30, 2018
Apr. 26, 2019
Dec. 31, 2018
Common Stock, Par or Stated Value Per Share       $ 0.001 $ 0.001 $ 0.001 $ 0.001
Proceeds from Issuance of Common Stock       $ 6,046,915 $ 200    
Underwritten Public Offering [Member]              
Stock Issued During Period, Shares, New Issues 8,000,000            
Common Stock, Par or Stated Value Per Share $ 0.001            
Shares Issued, Price Per Share $ 0.75            
Proceeds from Issuance of Common Stock $ 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            
Shares Issued, Price Per Share $ 0.69375            
CRG Loan Agreement, Texas Case [Member] | Judicial Ruling [Member]              
Loss Contingency, Damages Awarded, Value, Amount not Taken into Consideration   $ 4,100,000   $ 4,100,000      
Platinum-Montaur Life Sciences LLC Litigation [Member]              
Loss Contingency, Damages Sought, Value     $ 1,900,000