Concentration of credit risk (Tables)

3 Months Ended

Sep. 30, 2023

Concentration of credit risks [Abstract]

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,
	2023				2022
Domestic	$	1,502	51	%	$	1,620	62	%
Foreign	1,443		49	%	985		38	%
Total	$	2,945	100	%	$	2,605	100	%