Concentration of credit risk (Tables)

6 Months Ended

Dec. 31, 2021

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 December 31,								For the Six Months Ended December 31,
	2021				2020				2021				2020
Domestic	$	1,360	50.4	%	$	1,865	64.4	%	2,985		56	%	$	3,408	64.2	%
Foreign	1,341		49.6	%	1,033		35.6	%	2,391		44	%	1,904		35.8	%
Total	$	2,701	100.0	%	$	2,898	100.0	%	$	5,376	100	%	$	5,312	100.0	%