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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 01, 2022
Dec. 31, 2023
Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss   $ 3 $ 19
Inventory Valuation Reserves   627 499
Goodwill and Intangible Asset Impairment   2,593 6,737
Gain (Loss) on Fair Value Adjustment of Contingent Consideration   600  
Impairment, Long-Lived Asset, Held-for-Use   $ 2 66
Payment for Product Supply Period (Day)   30 days  
Advertising Expense   $ 1,100 2,000
Goodwill and Intangible Asset Impairment [Member]      
Impairment of Intangible Assets, Finite-Lived   1,000 1,600
Operating Lease, Impairment Loss   100  
Trade Names [Member] | Goodwill and Intangible Asset Impairment [Member]      
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) $ 1,000 1,100  
DERMAdoctor [Member]      
Goodwill and Intangible Asset Impairment   300 4,200
DERMAdoctor [Member] | General and Administrative Expense [Member]      
Impairment, Long-Lived Asset, Held-for-Use   $ 2 $ 66
Equipment [Member] | Minimum [Member]      
Property, Plant and Equipment, Useful Life (Year)   5 years  
Equipment [Member] | Maximum [Member]      
Property, Plant and Equipment, Useful Life (Year)   7 years  
Computer Equipment and Software [Member] | Minimum [Member]      
Property, Plant and Equipment, Useful Life (Year)   3 years  
Computer Equipment and Software [Member] | Maximum [Member]      
Property, Plant and Equipment, Useful Life (Year)   5 years  
Furniture and Fixtures [Member] | Minimum [Member]      
Property, Plant and Equipment, Useful Life (Year)   5 years  
Furniture and Fixtures [Member] | Maximum [Member]      
Property, Plant and Equipment, Useful Life (Year)   7 years  
Revenue from Contract with Customer Benchmark [Member] | Distributor Concentration Risk [Member] | Avenova Spray [Member]      
Concentration Risk, Percentage   67.00% 73.00%