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Note 3 - Revenues (Tables)

9 Months Ended

Sep. 30, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
(in thousands)		2024				2023				2024				2023
Instruments, equipment, software and accessories		$	20,543			$	23,500			$	64,594			$	79,261
Service, maintenance and warranty contracts			1,427				1,863				4,985				4,836
Total revenues		$	21,970			$	25,363			$	69,579			$	84,097

		Three Months Ended September 30,								Nine Months Ended September 30,
(in thousands)		2024				2023				2024				2023
Goods and services transferred at a point in time		$	21,119			$	24,668			$	66,845			$	81,610
Goods and services transferred over time			851				695				2,734				2,487
Total revenues		$	21,970			$	25,363			$	69,579			$	84,097

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

		Three Months Ended September 30,								Nine Months Ended September 30,
(in thousands)		2024				2023				2024				2023
United States		$	9,706			$	12,017			$	31,495			$	36,655
Europe			6,501				7,063				19,613				23,836
Greater China			2,731				3,489				10,426				13,824
Rest of the world			3,031				2,794				8,045				9,782
Total revenues		$	21,969			$	25,363			$	69,579			$	84,097

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

(dollars in thousands)		September 30, 2024				December 31, 2023				Change				Percentage
Service, maintenance and warranty contracts		$	2,472			$	2,849			$	(377	)			-13.2	%
Customer advances			1,217				1,659				(442	)			-26.6	%
Total contract liabilities		$	3,689			$	4,508			$	(819	)			-18.2	%

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

		Nine Months Ended September 30,
(in thousands)		2024				2023
Balance, beginning of period		$	160			$	191
Provision for expected credit losses			13				9
Charge-offs and other			1				(56	)
Balance, end of period		$	174			$	144

Schedule of Product Warranty Liability [Table Text Block]

		Nine Months Ended September 30,
(in thousands)		2024				2023
Balance, beginning of period		$	336			$	268
Provision for warranties			307				254
Warranty claims			(228	)			(214	)
Balance, end of period		$	415			$	308

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