Note 7 - Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Derivative Instruments [Table Text Block]

Currency	Contract Position	Contract Amount (Local Currency)		Contract Amount (U.S. Dollars)
Euro	Buy		81,677	$	87,300
Swiss Franc	Buy		20,714		22,500
				$	109,800

Derivative Instruments, Gain (Loss) [Table Text Block]

Derivatives Not Designated	Location of Gain (Loss)	Fiscal Year
as Hedging Instruments	Recognized on Derivatives	2022			2021			2020
Foreign exchange forward contracts	Foreign transaction gain (loss)	$	(5,356	)	$	(3,428	)	$	756