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Intangible assets (Details Narrative) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2020
Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]      
Amortization charge from continuing operations for the year   $ 604,011  
Trademarks $ 20,101,000   $ 20,313,000
Trademarks Not Subject to Amortization      
Finite-Lived Intangible Assets [Line Items]      
Trademarks 96,164    
Trademarks      
Finite-Lived Intangible Assets [Line Items]      
Trademarks $ 136,000   137,000
Trademarks | Minimum      
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life 5 years    
Trademarks | Maximum      
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life 10 years    
Patents      
Finite-Lived Intangible Assets [Line Items]      
Trademarks $ 2,281,000   2,281,000
Patents | Minimum      
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life 5 years    
Patents | Maximum      
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life 10 years    
License Agreements      
Finite-Lived Intangible Assets [Line Items]      
Trademarks $ 11,195,000   11,326,000
License Agreements | Minimum      
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life 3 years    
License Agreements | Maximum      
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life 5 years    
Other Intangibles      
Finite-Lived Intangible Assets [Line Items]      
Trademarks $ 6,393,000   $ 6,469,000
Other Intangibles | Minimum      
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life 3 years    
Other Intangibles | Maximum      
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life 10 years