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Note 3 - Revenues - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Revenues $ 24,512 $ 29,975
Transferred at Point in Time [Member]    
Revenues 23,743 29,306
Transferred over Time [Member]    
Revenues 769 669
Instruments, Equipment, Software, and Accessories [Member]    
Revenues 22,759 28,493
Service, Maintenance, and Warranty Contracts [Member]    
Revenues $ 1,753 $ 1,482