Summary of Significant Accounting Policies (Schedule of Fair Value for Financial Assets Measured on Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Assets
Total	$ 7,291	$ 7,275
Money market funds
Assets
Investments	4,291	4,275
Investment in non-marketable equity
Assets
Investments	3,000	3,000
Level 1
Assets
Total	4,291	4,275
Level 1 | Money market funds
Assets
Investments	4,291	4,275
Level 3
Assets
Total	3,000	3,000
Level 3 | Investment in non-marketable equity
Assets
Investments	$ 3,000	$ 3,000