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Concentration of credit risk (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Mar. 31, 2023
Jun. 30, 2023
Concentration Risk [Line Items]        
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Domestic and international sales from operations are as follows:
( in thousands)For the Three Months Ended September 30,
20232022
Domestic$1,502 51 %$1,620 62 %
Foreign1,443 49 %985 38 %
Total$2,945 100 %$2,605 100 %
     
Revenues $ 2,945,000 $ 2,604,816    
Customer Concentration Risk [Member] | Customer One [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Customer No No    
Geographic Concentration Risk [Member]        
Concentration Risk [Line Items]        
Revenues   $ 2,605,000    
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer One [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage 10.00% 10.00%    
Revenue Benchmark [Member] | Geographic Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage 100.00% 100.00%    
Revenues $ 2,945,000 $ 2,605,000    
Accounts Payable Benchmark [Member] | Supplier Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Supplier two   two  
Accounts Receivable Benchmark [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Customer two      
Accounts Receivable        
Concentration Risk [Line Items]        
Concentration Risk, Customer two one one  
Accounts Receivable | Customer Concentration Risk [Member] | Customer One [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage 13.00%   24.00%  
Domestic [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage 51.00% 62.00%    
Revenues $ 1,502,000 $ 1,620,000    
International [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage 49.00% 38.00%    
Revenues $ 1,443,000 $ 985,000    
Supplier one [Member] | Revenue Benchmark [Member] | Supplier Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage 39.00% 38.00%    
Supplier one [Member] | Accounts Payable Benchmark [Member] | Supplier Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage 25.00%     36.00%
Supplier two [Member] | Revenue Benchmark [Member] | Supplier Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage 12.00%      
Supplier two [Member] | Accounts Payable Benchmark [Member] | Supplier Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage 1200.00%     1100.00%