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Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Total sales, net $ 3,045 $ 2,133 $ 5,674 $ 3,940
Avenova Spray [Member]        
Total sales, net 1,626 1,883 3,052 3,458
DERMAdoctor [Member]        
Total sales, net 592 0 1,483 0
NeutroPhase [Member]        
Total sales, net 509 175 657 175
Other Products [member]        
Total sales, net 316 68 474 294
Total Product Revenue [Member]        
Total sales, net 3,043 2,126 5,666 3,927
Product and Service, Other [Member]        
Total sales, net $ 2 $ 7 $ 8 $ 13