Concentration of credit risk (Tables)

9 Months Ended

Mar. 31, 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 March 31,								For the Nine Months Ended March 31,
	2023				2022				2023				2022
Domestic	$	1,903	55	%	$	1,266	52	%	$	5,258	58	%	$	4,251	55	%
Foreign	1,531		45	%	1,150		48	%	3,787		42	%	3,541		45	%
Total	$	3,434	100	%	$	2,416	100	%	$	9,045	100	%	$	7,792	100	%