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Note 13 - Revenues (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Year Ended December 31,
(in thousands)		2023				2022
Instruments, equipment, software and accessories		$	105,716			$	108,165
Service, maintenance and warranty contracts			6,534				5,170
Total revenues		$	112,250			$	113,335

		Year Ended December 31,
(in thousands)		2023				2022
Goods and services transferred at a point in time		$	108,558			$	111,927
Goods and services transferred over time			3,692				1,408
Total revenues		$	112,250			$	113,335

Revenue from External Customers by Geographic Areas [Table Text Block]

		Year Ended December 31,
(in thousands)		2023				2022
United States		$	48,205			$	49,912
Europe			32,801				30,687
Greater China			18,488				16,393
Rest of the world			12,756				16,343
Total revenues		$	112,250			$	113,335

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

		December 31,												December 31,
(in thousands)		2023				2022				Change				2022				2021				Change
Service contracts		$	2,849			$	1,530			$	1,319				1,530			$	1,976			$	(446	)
Customer advances			1,659				1,840				(181	)			1,840				2,290				(450	)
Total contract liabilities		$	4,508			$	3,370			$	1,138				3,370			$	4,266			$	(896	)

Financing Receivable, Allowance for Credit Loss [Table Text Block]

		December 31,
(in thousands)		2023				2022
Balance, beginning of period		$	191			$	136
Provision for expected credit losses			29				62
Charge-offs and other			(60	)			(7	)
Balance, end of period		$	160			$	191

Schedule of Product Warranty Liability [Table Text Block]

		Year Ended December 31,
(in thousands)		2023				2022
Balance at December 31, 2022		$	268			$	240
Expense			381				408
Warranty claims			(313	)			(380	)
Balance at December 31, 2023		$	336			$	268

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Tabular disclosure of allowance for credit loss on financing receivable.

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