Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Revenues, net	$ 714,006	$ 642,993	$ 563,003
UNITED STATES
Revenues, net	391,191	346,293	313,195
EMEA, excluding U.K. [Member]
Revenues, net	155,821	148,599	125,126
UNITED KINGDOM
Revenues, net	34,975	33,704	28,401
APAC, excluding Greater China [Member]
Revenues, net	52,913	48,392	41,463
CHINA
Revenues, net	57,799	47,950	39,078
Rest of World [Member]
Revenues, net	21,307	18,055	15,740
Consumables [Member]
Revenues, net	588,979	534,738	476,541
Instruments [Member]
Revenues, net	67,538	61,784	47,751
Service [Member]
Revenues, net	38,050	34,137	23,652
Product and Services [Member]
Revenues, net	694,567	630,659	547,944
Royalty [Member]
Revenues, net	$ 19,439	$ 12,334	$ 15,059