Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Revenues, net	$ 243,552	$ 194,680	$ 672,004	$ 562,857
UNITED STATES
Revenues, net	131,586	109,797	359,586	311,815
EMEA, excluding U.K. [Member]
Revenues, net	54,552	39,108	147,622	115,993
UNITED KINGDOM
Revenues, net	11,213	9,166	29,599	24,619
APAC, excluding Greater China [Member]
Revenues, net	19,002	17,193	52,744	46,982
CHINA
Revenues, net	20,467	13,781	63,685	49,655
Rest of World [Member]
Revenues, net	6,732	5,635	18,768	13,793
Consumables [Member]
Revenues, net	198,818	161,958	542,909	462,660
Instruments [Member]
Revenues, net	24,748	16,405	70,849	53,381
Service [Member]
Revenues, net	14,503	11,426	45,142	32,917
Product and Services [Member]
Revenues, net	238,069	189,789	658,900	548,958
Royalty [Member]
Revenues, net	$ 5,483	$ 4,891	$ 13,104	$ 13,899