Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenues, net	$ 224,253	$ 184,934	$ 428,452	$ 368,177
UNITED STATES
Revenues, net	114,439	99,665	228,001	202,017
EMEA, excluding U.K. [Member]
Revenues, net	49,936	38,081	93,070	76,885
UNITED KINGDOM
Revenues, net	9,852	7,865	18,386	15,454
APAC, excluding Greater China [Member]
Revenues, net	18,008	15,784	33,742	29,789
CHINA
Revenues, net	25,165	19,793	43,218	35,873
Rest of World [Member]
Revenues, net	6,853	3,746	12,035	8,159
Consumables [Member]
Revenues, net	177,464	149,257	344,091	300,702
Instruments [Member]
Revenues, net	26,529	19,983	46,101	36,976
Service [Member]
Revenues, net	15,175	10,868	30,639	21,491
Product and Services [Member]
Revenues, net	219,168	180,108	420,831	359,168
Royalty [Member]
Revenues, net	$ 5,085	$ 4,826	$ 7,621	$ 9,009