Accumulated Other Comprehensive Income (Loss) - Changes in Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, balance		$ 906	$ 652	$ 466
Other comprehensive income (loss) before reclassifications		(1,503)	1,417	530
Other comprehensive income (loss), before reclassification adjustments, tax effect		341	(476)	(180)
Amount reclassified from AOCI		(344)	(1,041)	(248)
Amount reclassified from AOCI, tax effect		117	354	84
Net other comprehensive loss		(1,475)	263	186
Net other comprehensive income		(1,389)	254
Accumulated other comprehensive income, balance		(483)	906	652
Unrealized gains (losses) on available-for-sale investments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, balance	[1]	888	652	466
Other comprehensive income (loss) before reclassifications	[1]	(1,341)	1,399	530
Other comprehensive income (loss), before reclassification adjustments, tax effect	[1]	341	(476)	(180)
Amount reclassified from AOCI	[1]	(344)	(1,041)	(248)
Amount reclassified from AOCI, tax effect	[1]	117	354	84
Net other comprehensive loss	[1]			186
Net other comprehensive income	[1]	(1,227)	236
Accumulated other comprehensive income, balance	[1]	(339)	888	652
Foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, balance		18	0	0
Other comprehensive income (loss) before reclassifications		(162)	18	0
Other comprehensive income (loss), before reclassification adjustments, tax effect		0	0	0
Amount reclassified from AOCI		0	0	0
Amount reclassified from AOCI, tax effect		0	0	0
Net other comprehensive loss				0
Net other comprehensive income		(162)	18
Accumulated other comprehensive income, balance		$ (144)	$ 18	$ 0

[1] Amounts reclassified from unrealized gains (losses) on available-for-sale investments, net of tax, were recorded in investment income (loss) on the Consolidated Statements of Operations.