Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Deferred tax assets:
Net operating loss carry-forwards	$ 74,548	$ 36,514	$ 49,429
Tax credit carry-forwards	67,364	54,745	48,093
Depreciation	2,755	2,168	1,422
Intangible amortization	32,642	36,882	35,107
Deferred revenue, net	7,610	1,887	159
Inventory write-downs	13,014	10,277	13,682
Other allowances and accruals	32,318	30,210	25,700
Stock based compensation	3,169	4,114	4,872
Deferred intercompany gain	3,693	3,693
Irish goodwill amortization	7,132
Other	888	673	3,219
Total deferred tax assets	245,133	181,163	181,683
Valuation allowance	(232,862)	(169,343)	(177,869)
Total net deferred tax assets	12,271	11,820	3,814
Deferred tax liabilities:
Goodwill amortization	(6,691)	(4,904)	(3,363)
Prepaid commissions	(1,958)	(1,585)	(1,034)
Deferred tax liability on foreign withholdings	(551)	(505)	(357)
Total deferred tax liabilities	(9,200)	(6,994)	(4,754)
Net Deferred Tax Asset	3,071	4,826
Net Deferred Tax (Liability)			(940)
Recorded as:
Net non-current deferred tax assets	5,405	6,783	5,195
Net non-current deferred tax liabilities	(2,334)	(1,957)	(6,135)
Net Deferred Tax Asset	$ 3,071	$ 4,826
Net Deferred Tax (Liability)			$ (940)