Significant Accounting Policies Deferred revenue (Tables)

12 Months Ended

Jun. 30, 2021

Revenue Recognition and Deferred Revenue [Abstract]

Deferred Revenue, by Arrangement, Disclosure [Table Text Block]

	Years ended June 30,
	2021		2020
Beginning of Year	$	516,000	$	427,000
Additions	772,000		1,052,000
Revenue Recognized	924,000		$	963,000
End of Year	$	364,000	$	516,000