Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Fair Value Measurements (Details Textual)

Note 5 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	1 Months Ended			3 Months Ended		6 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021	May 31, 2021	Apr. 06, 2021	Jun. 30, 2020	Oct. 31, 2018
Interest Expense, Total				$ 2,902	$ 3,585	$ 6,311	$ 8,002
Income Tax Expense (Benefit), Total				14,120	10,224	12,522	16,168
Nonoperating Income (Expense), Total				23,831	5,373	27,992	(4,381)
Business Combination, Contingent Consideration, Liability, Total				9,000		9,000
Payment for Contingent Consideration Liability, Financing Activities						700	(0)
Acquisition of Asuragen, Inc. [Member]
Business Combination, Contingent Consideration, Liability, Total				18,300		18,300
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High				105,000		105,000				$ 105,000
B-MoGen [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High				38,000		38,000
QT Holdings Corporation [Member]
Payment for Contingent Consideration Liability, Financing Activities				4,000
AOCI Attributable to Parent [Member]
Interest Expense, Total						3,777
Income Tax Expense (Benefit), Total						(892)
Reclassification out of Accumulated Other Comprehensive Income [Member] \| AOCI Attributable to Parent [Member]
Interest Expense, Total							5,026
Nonoperating Income (Expense), Total							512
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Designated as Hedging Instrument [Member] \| AOCI Attributable to Parent [Member]
Interest Expense, Total						3,800	5,000
Income Tax Expense (Benefit), Total						(900)	(1,300)
Nonoperating Income (Expense), Total							500
Forward Starting Swap [Member] \| Cash Flow Hedging [Member]
Derivative, Notional Amount												$ 380,000
Derivative Notional Amount, Decrease in Period		$ 80,000	$ 100,000
Forward Starting Swap [Member] \| Cash Flow Hedging [Member] \| Other Noncurrent Liabilities [Member]
Derivative Notional Amount, Dedesignated					$ 80,000		$ 80,000				$ 80,000
Hedging Liabilities, Noncurrent				4,400		4,400		$ 7,600
Forward Starting Swap [Member] \| Cash Flow Hedging [Member] \| Forecast [Member]
Derivative Notional Amount, Decrease in Period	$ 200,000
New Forward Starting Swap [Member] \| Cash Flow Hedging [Member]
Derivative, Notional Amount									$ 200,000
New Forward Starting Swap [Member] \| Cash Flow Hedging [Member] \| Other Noncurrent Assets [Member]
Hedging Assets, Noncurrent, Total				2,300		2,300		300
CCXI [Member]
Investments, Total				6,600		6,600		6,600
Investments, Fair Value Disclosure, Total				$ 3,100		$ 3,100		$ 1,400