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Concentration of risk (Details Narrative) - USD ($)
6 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Concentration Risk [Line Items]        
Cash and cash equivalents $ 1,091,758 $ 544,073 $ 6,651,705 $ 977,635
Federal Deposit Insurance Corporation 250,000   250,000  
FDIC insurance limit $ 480,000   $ 5,400,000  
Cost of Sales [Member] | Product Concentration Risk [Member] | Two Suppliers [Member]        
Concentration Risk [Line Items]        
Concentration risk percent 29.00% 33.00%    
Cost of Sales [Member] | Product Concentration Risk [Member] | One Suppliers [Member]        
Concentration Risk [Line Items]        
Concentration risk percent 22.00% 22.00%    
Cost of Sales [Member] | Product Concentration Risk [Member] | Another Suppliers [Member]        
Concentration Risk [Line Items]        
Concentration risk percent 7.00% 11.00%    
Accounts Payable [Member] | Product Concentration Risk [Member] | One Supplier [Member]        
Concentration Risk [Line Items]        
Concentration risk percent 17.00%   11.00%  
Accounts Payable [Member] | Product Concentration Risk [Member] | Another Supplier [Member]        
Concentration Risk [Line Items]        
Concentration risk percent     10.00%  
Amazon Vendor And Amazon Seller [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration risk percent 89.00% 77.00%    
Amazon Vendor And Amazon Seller [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration risk percent 98.00% 98.00%