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Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Level 1 [Member] \| Recurring [Member]
Fair Value Measurements (Textuals) [Line Items]
Marketable securities	$ 11,193	$ 10,481

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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