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Note 3 - Revenues (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended June 30,								Six Months Ended June 30,
(in thousands)		2024				2023				2024				2023
Instruments, equipment, software and accessories		$	21,292			$	27,268			$	44,051			$	55,761
Service, maintenance and warranty contracts			1,805				1,491				3,558				2,973
Total revenues		$	23,097			$	28,759			$	47,609			$	58,734

		Three Months Ended June 30,								Six Months Ended June 30,
(in thousands)		2024				2023				2024				2023
Goods and services transferred at a point in time		$	21,983			$	27,636			$	45,726			$	56,942
Goods and services transferred over time			1,114				1,123				1,883				1,792
Total revenues		$	23,097			$	28,759			$	47,609			$	58,734

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

		Three Months Ended June 30,								Six Months Ended June 30,
(in thousands)		2024				2023				2024				2023
United States		$	10,805			$	12,336			$	21,788			$	24,638
Europe			6,535				9,332				13,113				16,773
Greater China			3,249				4,136				7,631				10,335
Rest of the world			2,508				2,955				5,077				6,988
Total revenues		$	23,097			$	28,759			$	47,609			$	58,734

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

(dollars in thousands)		June 30, 2024				December 31, 2023				Change				Percentage
Service, maintenance and warranty contracts		$	2,534			$	2,849			$	(315	)			-11.1	%
Customer advances			1,476				1,659				(183	)			-11.0	%
Total contract liabilities		$	4,010			$	4,508			$	(498	)			-11.0	%

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

		Six Months Ended June 30,
(in thousands)		2024				2023
Balance, beginning of period		$	160			$	191
Provision for expected credit losses			46				18
Charge-offs and other			(29	)			(55	)
Balance, end of period		$	177			$	154

Schedule of Product Warranty Liability [Table Text Block]

		Six Months Ended June 30,
(in thousands)		2024				2023
Balance, beginning of period		$	336			$	268
Provision for warranties			231				147
Warranty claims			(196	)			(114	)
Balance, end of period		$	371			$	301

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Tabular disclosure of allowance for credit loss on financing receivable.

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