Note 10 - Income Taxes - Temporary Differences Comprising Deferred Taxes on Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Inventory	$ 5,873	$ 9,415
Net operating loss carryovers	15,938	24,617
Tax credit carryovers	7,029	6,386
Excess tax basis in equity investments	2,813	4,381
Deferred compensation	7,806	9,052
Other	3,864	9,937
Valuation allowance	(2,978)	(3,341)
Deferred tax assets	40,345	60,447
Net unrealized gain on available-for-sale investments	(8,384)	(11,153)
Intangible asset amortization	(111,247)	(162,460)
Depreciation	(6,349)	(5,628)
Other	658	1,802
Deferred tax liabilities	(126,638)	(181,043)
Net deferred tax liabilities	$ (86,293)	$ (120,596)