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Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Total sales, net $ 3,826 $ 2,265 $ 10,761 $ 7,031
Avenova Spray [Member]        
Total sales, net 1,939 2,145 5,778 6,358
DERMAdoctor [Member]        
Total sales, net 1,319 0 3,115 0
NeutroPhase [Member]        
Total sales, net 0 0 657 175
Other Products [member]        
Total sales, net 558 114 1,193 479
Total Product Revenue [Member]        
Total sales, net 3,816 2,259 10,743 7,012
Product and Service, Other [Member]        
Total sales, net $ 10 $ 6 $ 18 $ 19