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Note 9 - Fair Value Considerations (Details Textual)
shares in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
shares
Feb. 14, 2020
USD ($)
shares
Nov. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jun. 30, 2020
USD ($)
Nov. 02, 2018
USD ($)
Jun. 11, 2018
USD ($)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability       $ 3,313,656 $ 2,411,333      
Gain (Loss) from Change in Fair Value of CVR           (899,987)      
Tuzistra XR [Member]                    
Business Combination, Contingent Consideration, Liability, Total       15,800,000   15,800,000     $ 8,800,000  
Tuzistra XR [Member] | Forecast [Member]                    
Payment for Contingent Consideration Liability, Operating Activities     $ 3,000,000              
ZolpiMist [Member]                    
Business Combination, Contingent Consideration, Liability, Total       300,000   300,000       $ 2,600,000
Innovus Pharmaceuticals [Member]                    
Business Combination, Contingent Consideration, Liability, Total   $ 200,000                
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability       15,000 15,000 28,000 28,000      
Business Combination, Contingent Value Rights, Maximum Range of Outcomes   $ 16,000,000                
Business Combination, Maximum Shares to be Issued to Settle CVR (in shares) | shares   470                
Stock Issued During Period, Shares, Contingent Value Rights (in shares) | shares 120                  
Stock Issued During Period, Value, Contingent Value Rights $ 2,000,000                  
Business Combination, Contingent Value Rights, First Revenue Milestone 24,000,000                  
Gain (Loss) from Change in Fair Value of CVR $ 300,000     $ (100,000) $ (100,000) $ (800,000) $ (800,000) $ 300,000    
Innovus Pharmaceuticals [Member] | Measurement Input, Discount Rate [Member]                    
Business Combination, Contingent Consideration, Liability, Measurement Input   0.3