Note 1 - General and Basis of Presentation - Changes in the Allowance for Expected Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Beginning balance of the allowance for expected credit losses	$ 90
Ending balance of the allowance for expected credit losses	163
Accounting Standards Update 2016-13 [Member]
Beginning balance of the allowance for expected credit losses	90	$ 90
Change in the provision for expected credit losses for the period	73	0
Ending balance of the allowance for expected credit losses	$ 163	$ 90