Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Deferred tax assets:
Net operating loss carry-forwards	$ 69,126	$ 74,548	$ 36,514
Tax credit carry-forwards	68,003	67,364	54,745
Depreciation	3,113	2,755	2,168
Intangible amortization	35,340	32,642	36,882
Deferred revenue	11,625	7,610	1,887
Inventory write-downs	14,501	13,014	10,277
Other allowances and accruals	28,899	32,318	30,210
Stock based compensation	2,792	3,169	4,114
Deferred intercompany gain	3,693	3,693	3,693
Ireland goodwill amortization	6,303	7,132
Other	1,175	888	673
Total deferred tax assets	244,570	245,133	181,163
Valuation allowance	(230,588)	(232,862)	(169,343)
Total net deferred tax assets	13,982	12,271	11,820
Deferred tax liabilities:
Goodwill amortization	(8,575)	(6,691)	(4,904)
Prepaid commissions	(3,166)	(1,958)	(1,585)
Deferred tax liability on foreign withholdings	(578)	(551)	(505)
Total deferred tax liabilities	(12,319)	(9,200)	(6,994)
Net deferred tax assets	1,663	3,071	4,826
Recorded as:
Net non-current deferred tax assets	5,491	5,405	6,783
Net non-current deferred tax liabilities	(3,828)	(2,334)	(1,957)
Net deferred tax assets	$ 1,663	$ 3,071	$ 4,826