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Concentration of credit risk (Details) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended
Mar. 31, 2024
Sep. 30, 2023
Mar. 31, 2023
Dec. 31, 2023
Mar. 31, 2024
Mar. 31, 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 March 31, For the Nine Months Ended March 31,
2024202320242023
Domestic$1,339 50 %$1,903 55 %$4,394 52 %$5,258 58 %
Foreign1,357 50 %1,531 45 %4,116 48 %3,787 42 %
Total$2,696 100 %$3,434 100 %$8,510 100 %$9,045 100 %
 
Revenues $ 2,695,501   $ 3,434,314   $ 8,509,738 $ 9,044,619
Customer Concentration Risk [Member] | Customer One [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Customer One   No   One  
Geographic Concentration Risk [Member]            
Concentration Risk [Line Items]            
Revenues           $ 9,045,000
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer One [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage 13.00%   10.00%   11.00%  
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer two            
Concentration Risk [Line Items]            
Concentration Risk, Percentage          
Revenue Benchmark [Member] | Geographic Concentration Risk [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage 100.00%   100.00%   100.00% 100.00%
Revenues $ 2,696,000   $ 3,434,000   $ 8,510,000 $ 9,045,000
Accounts Payable Benchmark [Member] | Supplier Concentration Risk [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Supplier   two     three  
Accounts Receivable Benchmark [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Customer         two  
Accounts Receivable            
Concentration Risk [Line Items]            
Concentration Risk, Customer two one two   one  
Accounts Receivable | Customer Concentration Risk [Member] | Customer One [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage   24.00%     16.00%  
Accounts Receivable | Customer Concentration Risk [Member] | Customer two            
Concentration Risk [Line Items]            
Concentration Risk, Percentage         11.00%  
Domestic [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage 50.00%   55.00%   52.00% 58.00%
Revenues $ 1,339,000   $ 1,903,000   $ 4,394,000 $ 5,258,000
International [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage 50.00%   45.00%   48.00% 42.00%
Revenues $ 1,357,000   $ 1,531,000   $ 4,116,000 $ 3,787,000
Supplier one [Member] | Revenue Benchmark [Member] | Supplier Concentration Risk [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage 36.00%   44.00%   40.00% 44.00%
Supplier one [Member] | Accounts Payable Benchmark [Member] | Supplier Concentration Risk [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage       36.00% 29.00%  
Supplier two [Member] | Revenue Benchmark [Member] | Supplier Concentration Risk [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage 11.00%   11.00%     10.00%
Supplier two [Member] | Accounts Payable Benchmark [Member] | Supplier Concentration Risk [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage       11.00% 12.00%  
Supplier Three | Accounts Payable Benchmark [Member] | Supplier Concentration Risk [Member]            
Concentration Risk [Line Items]            
Concentration Risk, Percentage         11.00%