Note 1 - Summary of Significant Accounting Policies - Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Raw materials and purchased parts	$ 106,466	$ 106,041
Work in process	32,738	36,024
Finished goods	27,469	28,076
Total inventories	$ 166,673	$ 170,141	[1]

[1] Derived from December 31, 2022 audited financial statements