Note 11 - Segment Information - Segment Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026
Total inventories	$ 27,229	$ 26,373
Operating Segments [Member] \| Sterilization and Disinfection Control [Member]
Total inventories	5,516	5,943
Operating Segments [Member] \| Biopharmaceutical Development [Member]
Total inventories	6,528	6,512
Operating Segments [Member] \| Calibration Solutions [Member]
Total inventories	5,928	5,603
Operating Segments [Member] \| Clinical Genomics [Member]
Total inventories	$ 9,257	$ 8,315

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-3

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483467/210-10-45-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant