Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Revenues, net	$ 738,691	$ 714,006	$ 642,993
UNITED STATES
Revenues, net	404,407	391,191	346,293
EMEA, excluding U.K. [Member]
Revenues, net	155,289	155,821	148,599
UNITED KINGDOM
Revenues, net	30,411	34,975	33,704
APAC, excluding Greater China [Member]
Revenues, net	60,362	52,913	48,392
CHINA
Revenues, net	68,792	57,799	47,950
Rest of World [Member]
Revenues, net	19,430	21,307	18,055
Consumables [Member]
Revenues, net	602,642	588,979	534,738
Instruments [Member]
Revenues, net	71,462	67,538	61,784
Service [Member]
Revenues, net	47,459	38,050	34,137
Product and Services [Member]
Revenues, net	721,563	694,567	630,659
Royalty [Member]
Revenues, net	$ 17,128	$ 19,439	$ 12,334