Fair Value Measurements (Schedule of Fair Value for Financial Assets and Liabilities Measured on Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Assets
Total assets measured at fair value	$ 428	$ 1,459
Liabilities
Acquisition-related contingent consideration obligations	8,649	12,749
Total liabilities measured at fair value	8,649	12,749
Marketable securities
Assets
Investments	428	1,459
Level 1
Assets
Total assets measured at fair value	428	1,459
Level 1 | Marketable securities
Assets
Investments	428	1,459
Level 3
Liabilities
Acquisition-related contingent consideration obligations	8,649	12,749
Total liabilities measured at fair value	$ 8,649	$ 12,749