Note 6 - Goodwill and Intangible Assets, Net - Change in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Goodwill	$ 180,096	$ 286,444
Effect of foreign currency translation	1,664	853
Impairment losses	0	(156,892)	$ 0
Goodwill	181,760	180,096	286,444
GKE Acquisition [Member]
Goodwill acquired		48,850
Belyntic Acquisition [Member]
Measurement period adjustment		841
Operating Segments [Member] \| Sterilization and Disinfection Control [Member]
Goodwill	79,430	29,559
Effect of foreign currency translation	(22)	1,021
Impairment losses		0
Goodwill	79,408	79,430	29,559
Operating Segments [Member] \| Sterilization and Disinfection Control [Member] \| GKE Acquisition [Member]
Goodwill acquired		48,850
Operating Segments [Member] \| Sterilization and Disinfection Control [Member] \| Belyntic Acquisition [Member]
Measurement period adjustment		0
Operating Segments [Member] \| Clinical Genomics [Member]
Goodwill	16,940	135,811
Effect of foreign currency translation	(12)	(130)
Impairment losses		(118,741)
Goodwill	16,928	16,940	135,811
Operating Segments [Member] \| Clinical Genomics [Member] \| GKE Acquisition [Member]
Goodwill acquired		0
Operating Segments [Member] \| Clinical Genomics [Member] \| Belyntic Acquisition [Member]
Measurement period adjustment		0
Operating Segments [Member] \| Biopharmaceutical Development [Member]
Goodwill	46,515	83,857
Effect of foreign currency translation	1,696	(32)
Impairment losses		(38,151)
Goodwill	48,211	46,515	83,857
Operating Segments [Member] \| Biopharmaceutical Development [Member] \| GKE Acquisition [Member]
Goodwill acquired		0
Operating Segments [Member] \| Biopharmaceutical Development [Member] \| Belyntic Acquisition [Member]
Measurement period adjustment		841
Operating Segments [Member] \| Calibration Solutions [Member]
Goodwill	37,211	37,217
Effect of foreign currency translation	2	(6)
Impairment losses		0
Goodwill	$ 37,213	37,211	$ 37,217
Operating Segments [Member] \| Calibration Solutions [Member] \| GKE Acquisition [Member]
Goodwill acquired		0
Operating Segments [Member] \| Calibration Solutions [Member] \| Belyntic Acquisition [Member]
Measurement period adjustment		$ 0

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