v3.19.3
Note 9 - Warrants (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
May 03, 2019
USD ($)
$ / shares
shares
Jan. 31, 2016
USD ($)
$ / shares
shares
Nov. 30, 2015
USD ($)
$ / shares
shares
Jul. 01, 2010
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
Nov. 24, 2015
shares
Fair Value Adjustment of Warrants           $ 95,000 $ 1,000 $ 98,000 $ (12,000)  
Exchange of Warrants Upon Merger         $ 234,000          
Warrant to Purchase Series A Convertible Preferred Stock Under Oxford Loan Agreement [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares   131,810 197,715             11,829
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares   $ 0.2276 $ 0.2276              
Warrants Not Settleable in Cash, Fair Value Disclosure   $ 22,000 $ 33,000              
Percentage of Note Payable Principal       20.00%            
Class of Warrants or Right, Exercisable, Term   10 years 10 years 5 years            
Warrant to Purchase Series A Convertible Preferred Stock Under Oxford Loan Agreement [Member] | Measurement Input, Expected Term [Member]                    
Warrants and Rights Outstanding, Measurement Input   10 10              
Warrant to Purchase Series A Convertible Preferred Stock Under Oxford Loan Agreement [Member] | Measurement Input, Expected Term [Member] | Minimum [Member]                    
Warrants and Rights Outstanding, Measurement Input       3.92            
Warrant to Purchase Series A Convertible Preferred Stock Under Oxford Loan Agreement [Member] | Measurement Input, Risk Free Interest Rate [Member]                    
Warrants and Rights Outstanding, Measurement Input   0.0209 0.0207              
Warrant to Purchase Series A Convertible Preferred Stock Under Oxford Loan Agreement [Member] | Measurement Input, Price Volatility [Member]                    
Warrants and Rights Outstanding, Measurement Input   0.686 0.687              
Warrant to Purchase Series A Convertible Preferred Stock Under Oxford Loan Agreement [Member] | Measurement Input, Conversion Price [Member]                    
Warrants and Rights Outstanding, Measurement Input     0.20              
Warrant to Purchase Series A Convertible Preferred Stock Under Oxford Loan Agreement [Member] | Measurement Input, Share Price [Member]                    
Warrants and Rights Outstanding, Measurement Input   0.23                
Warrants For Series A Convertible Preferred Stock [Member]                    
Warrants and Rights Outstanding               $ 140,000 $ 42,000  
Class of Warrant or Right, Outstanding | shares               330    
Class of Warrants or Right, Exercisable, Term       7 years            
Warrants For Series A Convertible Preferred Stock [Member] | Measurement Input, Expected Term [Member] | Minimum [Member]                    
Warrants and Rights Outstanding, Measurement Input               6.92 7.92  
Warrants For Series A Convertible Preferred Stock [Member] | Measurement Input, Expected Term [Member] | Maximum [Member]                    
Warrants and Rights Outstanding, Measurement Input       7       7.08 8.08  
Warrants For Series A Convertible Preferred Stock [Member] | Measurement Input, Risk Free Interest Rate [Member]                    
Warrants and Rights Outstanding, Measurement Input                 2.28  
Warrants For Series A Convertible Preferred Stock [Member] | Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]                    
Warrants and Rights Outstanding, Measurement Input       0.0146       2.56    
Warrants For Series A Convertible Preferred Stock [Member] | Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]                    
Warrants and Rights Outstanding, Measurement Input       0.0266       2.59    
Warrants For Series A Convertible Preferred Stock [Member] | Measurement Input, Price Volatility [Member]                    
Warrants and Rights Outstanding, Measurement Input                 71.00  
Warrants For Series A Convertible Preferred Stock [Member] | Measurement Input, Price Volatility [Member] | Minimum [Member]                    
Warrants and Rights Outstanding, Measurement Input       0.736       76.84    
Warrants For Series A Convertible Preferred Stock [Member] | Measurement Input, Price Volatility [Member] | Maximum [Member]                    
Warrants and Rights Outstanding, Measurement Input       0.815            
Warrants For Series A Convertible Preferred Stock [Member] | Measurement Input, Conversion Price [Member]                    
Warrants and Rights Outstanding, Measurement Input       0.2276            
Warrant Issued In Connection With Term Loan A And B [Member]                    
Fair Value Adjustment of Warrants               $ 98,000 $ (12,000)  
Alliqua Warrants Assumed in Merger [Member]                    
Class of Warrant or Right, Outstanding | shares 38,945                  
Alliqua Warrants Assumed in Merger [Member] | Minimum [Member]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares $ 26.40                  
Alliqua Warrants Assumed in Merger [Member] | Maximum [Member]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares $ 28.20                  
Alliqua Biomedical, Inc. [Member] | Warrant to Purchase Common Stock Converted in Merger [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares 11,829                  
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares $ 6.34                  
Exchange of Warrants Upon Merger $ 234,000