Note 6 - Revenue From Contracts With Customers - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Revenue	$ 36,603	$ 30,272	$ 33,991	$ 29,824	$ 27,884	$ 30,941	$ 32,558	$ 31,919	$ 130,690	$ 123,302
Semiconductor Market [Member]
Revenue									48,708	65,735
Industrial Market [Member]
Revenue									13,382	14,310
Automotive [Member]
Revenue									32,871	9,895
Life Sciences [Member]
Revenue									5,400	4,856
Defense/ Aerospace [Member]
Revenue									15,317	12,537
Security [Member]
Revenue									2,946	3,688
Other Multi Markets [Member]
Revenue									12,066	12,281
Thermal Testing Products [Member]
Revenue									17,822	21,344
Thermal Process [Member]
Revenue									33,783	44,914
Semiconductor Production Test Products [Member]
Revenue									24,084	30,235
Video Imaging [Member]
Revenue									7,643	9,086
Flying Probe and In-circuit Testers [Member]
Revenue									9,340	6,981
Alfamation [Member]
Revenue									23,383	0
Service and Other Products [Member]
Revenue									14,635	10,742
End User [Member]
Revenue									105,955	85,397
OEM and Integrators [Member]
Revenue									$ 24,735	$ 37,905