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Concentration of credit risk (Tables)
 12 Months Ended
Jun. 30, 2024
Concentration Risk [Line Items]  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Domestic and international sales from continuing operations are as follows:
(in thousands)For the Years Ended June 30,
20242023
Domestic$6,363 53.1 %$7,044 57.8 %
Foreign5,619 46.9 %5,136 42.2 %
Total$11,982 100.0 %$12,180 100.0 %