v3.19.3
Note 11 - Stock Options (Details Textual) - USD ($)
9 Months Ended 12 Months Ended
May 03, 2019
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       0 0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance   731   690 19,222,000 19,222,000
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount       $ 531,000    
Non-employee Stock Options, Comensation Expense, Cost Not yet Recognized, Amount       $ 48,000    
Non-employee Stock Options, Comensation Expense, Cost Not yet Recognized, Period for Recognition       270 days    
Common Stock, Capital Shares Reserved for Future Issuance       19,222,032 19,222,032  
Share Price       $ 0.46 $ 0.44  
Share-based Payment Arrangement, Option [Member]            
Share-based Payment Arrangement, Expense   $ 204,000 $ 225,000 $ 293,000 $ 301,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total   $ 327,000        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition   1 year 3 months 18 days   2 years    
Non-employee Options [Member]            
Share-based Payment Arrangement, Expense   $ 48,000 $ 0 $ 16,000 $ 0  
Non-employee Stock Options, Comensation Expense, Cost Not yet Recognized, Amount   $ 0        
Alliqua Biomedical, Inc. [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 690,058          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance 57,822          
Minimum [Member] | Alliqua Biomedical, Inc. [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercise Price $ 21.00          
Maximum [Member] | Alliqua Biomedical, Inc. [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercise Price 656.40          
Alliqua Biomedical, Inc. [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance   58        
Alliqua Biomedical, Inc. [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercise Price 1.11          
Alliqua Biomedical, Inc. [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercise Price $ 3.06          
The Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Minimum Price as Percentage of Estimated Fair Value of Underlying Shares       100.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Minimum Price as Percentage of Estimated Fair Value of Underlying Shares, 10% Shareholder       110.00%    
The Plan [Member] | Share-based Payment Arrangement, Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period       10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       4 years