Significant Accounting Policies (Details) (U.S. corporate bonds, USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Short-term Marketable Securities
Marketable Securities
Fair Value	$ 67,619	$ 57,015
Cost	67,587	57,046
Unrealized Gain	39	8
Unrealized Loss	(7)	(39)
Long-term Marketable Securities
Marketable Securities
Fair Value	31,270	35,353
Cost	31,290	35,402
Unrealized Gain	1	0
Unrealized Loss	$ (21)	$ (49)