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Note 3 - Revenues (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended March 31,
(in thousands)		2024				2023
Instruments, equipment, software and accessories		$	22,759			$	28,493
Service, maintenance and warranty contracts			1,753				1,482
Total revenues		$	24,512			$	29,975

		Three Months Ended March 31,
(in thousands)		2024				2023
Goods and services transferred at a point in time		$	23,743			$	29,306
Goods and services transferred over time			769				669
Total revenues		$	24,512			$	29,975

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

		Three Months Ended March 31,
(in thousands)		2024				2023
United States		$	10,983			$	12,302
Europe			6,578				7,441
Greater China			4,382				6,505
Rest of the world			2,569				3,727
Total revenues		$	24,512			$	29,975

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

(dollars in thousands)		March 31, 2024				December 31, 2023				Change				Percentage
Service, maintenance and warranty contracts		$	2,748			$	2,849			$	(101	)			-3.5	%
Customer advances			1,640				1,659				(19	)			-1.1	%
Total contract liabilities		$	4,388			$	4,508			$	(120	)			-2.7	%

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

		Three Months Ended March 31,
(in thousands)		2024				2023
Balance, beginning of period		$	160			$	191
Provision for expected credit losses			1				(3	)
Charge-offs and other			(34	)			(21	)
Balance, end of period		$	127			$	167

Schedule of Product Warranty Liability [Table Text Block]

		Three Months Ended March 31,
(in thousands)		2024				2023
Balance, beginning of period		$	336			$	268
Expense			105				83
Warranty claims			(82	)			(72	)
Balance, end of period		$	359			$	279

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