Income Taxes - Unrecognized Roll Forward (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Reconciliation of unrecognized tax benefits:
Gross unrecognized, bgn	$ 866,000	$ 125,000	$ 221,000
Decrease due to release of R&D credits due to the IRS Audit	(185,000)		(151,000)
Increase (decrease) from deemed dividends for investments in US Property	(3,000)	682,000	55,000
Increase from the generation of additional R&D credits		59,000
Gross unrecognized, end	678,000	866,000	125,000
Interest
Unrecognized interest, bgn	83,000	0	0
Unrecognized, accrued interest		83,000
(Decrease) Unrecognized, accrued interest	(20,000)
Unrecognized interest, end	63,000	83,000	0
Total
Total, bgn	949,000	125,000	221,000
Decrease due to release of R&D credits due to the IRS Audit	(185,000)		(151,000)
Increase (decrease) to unrecognized tax benefits including interest	(23,000)	765,000	55,000
Increase from the generation of additional R&D credits		59,000
Total, end	$ 741,000	$ 949,000	$ 125,000