Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Total intangible assets, net	$ 1,744	$ 1,879
Amortization of intangible assets	100	100	$ 100
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2017	100
2018	100
2019	100
2020	100
2021	100
Patent costs
Finite-Lived Intangible Assets [Line Items]
Patent costs	2,330	2,330
Accumulated amortization	(1,181)	(1,046)
Total definite-lived intangible assets, net	1,149	1,284
Trademark costs
Finite-Lived Intangible Assets [Line Items]
Trademarks and other indefinite-lived intangible assets	$ 595	$ 595