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Note 11 - Revenues - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Revenues $ 29,975 $ 28,778
Instruments, Equipment, Software, and Accessories [Member]    
Revenues 28,493 27,538
Service, Maintenance, and Warranty Contracts [Member]    
Revenues $ 1,482 $ 1,240