Intangible Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Total intangible assets, net	$ 851	$ 983
Amortization of intangible assets	$ 100	100	$ 100
Definite-lived intangible assets weighted-average amortization period	4 years 9 months
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2021	$ 100
2022	100
2023	100
2024	100
2025	100
Patent costs
Finite-Lived Intangible Assets [Line Items]
Patent costs	2,330	2,330
Accumulated amortization	(1,724)	(1,592)
Total definite-lived intangible assets, net	606	738
Trademark costs
Finite-Lived Intangible Assets [Line Items]
Trademarks and other indefinite-lived intangible assets	$ 245	$ 245