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Note 2 - Summary of Significant Accounting Policies (Details Textual)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Number of Operating Segments 1  
Accounts Receivable, Allowance for Credit Loss $ 3 $ 3
Inventory Valuation Reserves, Including Disposal and Discontinued Operations $ 30 $ 218
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]   Net loss from discontinued operations
Impairment of Intangible Assets, Finite-Lived   $ 1,000
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]   Net loss from discontinued operations
Operating Lease, Impairment Loss   $ 100
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] Net loss from discontinued operations Net loss from discontinued operations
Payment for Product Supply Period (Day) 60 days  
Advertising Expense $ 700 $ 1,100
Goodwill and Intangible Asset Impairment [Member]    
Operating Lease, Impairment Loss   100
Trade Names [Member]    
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)   1,100
DERMAdoctor [Member]    
Goodwill and Intangible Asset Impairment   300
Impairment, Long-Lived Asset, Held-for-Use $ 0 $ 2
Equipment [Member] | Minimum [Member]    
Property, Plant and Equipment, Useful Life 5 years  
Equipment [Member] | Maximum [Member]    
Property, Plant and Equipment, Useful Life 7 years  
Computer Equipment and Software [Member] | Minimum [Member]    
Property, Plant and Equipment, Useful Life 3 years  
Computer Equipment and Software [Member] | Maximum [Member]    
Property, Plant and Equipment, Useful Life 5 years  
Furniture and Fixtures [Member] | Minimum [Member]    
Property, Plant and Equipment, Useful Life 5 years  
Furniture and Fixtures [Member] | Maximum [Member]    
Property, Plant and Equipment, Useful Life 7 years  
Revenue from Contract with Customer Benchmark [Member] | Distributor Concentration Risk [Member] | Avenova Spray [Member]    
Concentration Risk, Percentage 73.00% 67.00%