Note 4 - Acquisition - Unaudited Pro Forma Financial Information (Details) - Honeywell International, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021		Mar. 31, 2020
Net sales	$ 126,345		$ 94,630
Net income	$ 13,949	[1]	$ 2,500
Diluted earnings per share (in dollars per share)	$ 1.90		$ 0.34

[1] The Acquisition-related costs mentioned above are excluded from the unaudited pro forma net income.