Concentration of credit risk (Tables)

12 Months Ended

Jun. 30, 2021

Concentration Risk [Line Items]

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 Years Ended June 30,
	2021				2020
Domestic	$	6,255	59.7	%	$	5,781	61.5	%
Foreign	4,217		40.3	%	3,619		38.5	%
Total	$	10,472	100.0	%	$	9,400	100.0	%