Concentration of credit risk (Tables)

9 Months Ended

Mar. 31, 2021

Concentration of credit risks [Abstract]

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 Three Months Ended March 31,								For the Nine Months Ended March 31,
	2021				2020				2021				2020
Domestic	$	1,107	47.6	%	$	1,440	61.1	%	$	4,514	59.1	%	$	4,496	60.9	%
Foreign	1,218		52.4	%	917		38.9	%	3,123		40.9	%	2,889		39.1	%
Total	$	2,325	100.0	%	$	2,357	100.0	%	$	7,637	100.0	%	$	7,385	100.0	%