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Note 11 - Significant Transactions (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			2 Months Ended	3 Months Ended		9 Months Ended
		Oct. 20, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Payments to Acquire Businesses, Gross						$ 300,793	$ (0)
Goodwill, Ending Balance			$ 293,542	$ 293,542		293,542		$ 160,841
Amortization of Intangible Assets, Total				5,922	$ 3,828	$ 13,495	$ 10,694
Effective Income Tax Rate Reconciliation, Percent, Total						1.00%	(75.00%)
Closure of Our Butler, New Jersey Facility [Member]
Severance Costs				0		$ 77
Restructuring and Related Cost, Expected Cost Remaining			0	0		0
Agena [Member]
Business Acquisition, Share Price (in dollars per share)		$ 5.96
Payments to Acquire Businesses, Gross		$ 300,793
Payments to Acquire Businesses, Settlement of Options		31,800
Goodwill, Ending Balance	[1]	136,006
Amortization of Intangible Assets, Total				2,828		8,485
Business Combination, Acquisition Related Costs				605		723
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				16,485
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual				$ (4,532)
Effective Income Tax Rate Reconciliation, Percent, Total				26.00%
Agena [Member] | Clinical Genomics [Member] | General and Administrative Expense [Member]
Amortization of Intangible Assets, Total			1,320
Agena [Member] | Clinical Genomics [Member] | Cost of Sales [Member]
Amortization of Intangible Assets, Total			$ 911
Agena [Member] | Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Asset, Useful Life (Year)			14 years 2 months 12 days
Agena [Member] | Fair Value Adjustment to Inventory [Member]
Cost of Goods and Services Sold, Total				$ (6,062)	$ 6,062	$ (6,062)	$ 6,062
Agena [Member] | Agena Warrants [Member]
Payments to Acquire Businesses, Gross		2,000
Agena [Member] | Holders of Agena Preferred and Common Stock [Member]
Payments to Acquire Businesses, Gross		$ 267,000
[1] Acquired goodwill of $136,006, all of which is allocated to the Clinical Genomics reportable segment, represents the value expected to arise from the value of expanded market opportunities, expected synergies, and assembled workforce, none of which qualify as amortizable intangible assets. The goodwill acquired is not deductible for income tax purposes.

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