Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Revenues, net	$ 931,032	$ 738,691	$ 714,006
UNITED STATES
Revenues, net	502,080	404,407	391,191
EMEA, excluding U.K. [Member]
Revenues, net	204,264	155,289	155,821
UNITED KINGDOM
Revenues, net	40,945	30,411	34,975
APAC, excluding Greater China [Member]
Revenues, net	69,013	60,362	52,913
CHINA
Revenues, net	87,556	68,792	57,799
Rest of World [Member]
Revenues, net	27,174	19,430	21,307
Consumables [Member]
Revenues, net	751,985	602,642	588,979
Instruments [Member]
Revenues, net	93,782	71,462	67,538
Service [Member]
Revenues, net	66,416	47,459	38,050
Product and Services [Member]
Revenues, net	912,183	721,563	694,567
Royalty [Member]
Revenues, net	$ 18,849	$ 17,128	$ 19,439