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Summary of significant accounting policies (Details)
Dec. 31, 2024
Building [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 45 years
Equipment [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 4 years
Equipment [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 10 years
Furniture and Fixtures [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 3 years
Furniture and Fixtures [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 5 years
Automobiles [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 5 years
Automobiles [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 10 years