Concentration of credit risk (Tables)

3 Months Ended

Sep. 30, 2022

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,
	2022				2021
Domestic	$	1,620	62.2	%	$	1,625	60.7	%
Foreign	985		37.8	%	$	1,050	39.3	%
Total	$	2,605	100	%	$	2,675	100	%