Concentration of credit risk (Tables)

9 Months Ended

Mar. 31, 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 March 31,								For the Nine Months Ended March 31,
	2022				2021				2022				2021
Domestic	$	1,266	52.4	%	$	1,107	47.6	%	4,251		54.6	%	$	4,514	59.1	%
Foreign	1,150		47.6	%	1,218		52.4	%	3,541		45.4	%	3,123		40.9	%
Total	$	2,416	100.0	%	$	2,325	100.0	%	$	7,792	100	%	$	7,637	100	%