Marketable Securities (Details) (U.S. corporate bonds, USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014
Short-term Marketable Securities
Marketable Securities
Fair Value	$ 72,352	$ 67,619
Cost	72,356	67,587
Unrealized Gain	20	39
Unrealized Loss	(24)	(7)
Long-term Marketable Securities
Marketable Securities
Fair Value	23,635	31,270
Cost	23,680	31,290
Unrealized Gain	0	1
Unrealized Loss	$ (45)	$ (21)