Note 4 - Acquisition - Unaudited Pro Forma Financial Information (Details) - Honeywell International, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021		Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net sales	$ 131,602		$ 90,255	$ 257,947	$ 184,885
Net income	$ 6,154	[1]	$ 3,081	$ 20,103	$ 5,581
Diluted earnings per share (in dollars per share)	$ 0.83		$ 0.42	$ 2.72	$ 0.76

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