Note 7 - Revenue From Contracts With Customers - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	[1]	Sep. 30, 2021	[2]	Jun. 30, 2021	[3]	Mar. 31, 2021	[4]	Dec. 31, 2022	Dec. 31, 2021
Revenue	$ 32,405	$ 30,771	$ 29,571	$ 24,081	$ 22,358		$ 21,144		$ 21,820		$ 19,556		$ 116,828	$ 84,878
Semiconductor Market [Member]
Revenue													68,422	54,937
Industrial Market [Member]
Revenue													10,038	7,314
Automotive [Member]
Revenue													10,776	6,205
Life Sciences [Member]
Revenue													4,589	2,353
Defense/ Aerospace [Member]
Revenue													7,006	5,043
Security [Member]
Revenue													3,241	699
Other Multi Markets [Member]
Revenue													12,756	8,327
Thermal Testing Products [Member]
Revenue													22,246	19,204
Thermal Process [Member]
Revenue													38,574	26,260
Semiconductor Production Test Products [Member]
Revenue													28,529	30,829
Video Imaging [Member]
Revenue													9,499	1,434
Flying Probe and In-circuit Testers [Member]
Revenue													7,414	48
Service and Other Products [Member]
Revenue													10,566	7,103
End User [Member]
Revenue													84,468	62,541
OEM and Integrators [Member]
Revenue													$ 32,360	$ 22,337

[1] The quarter ended December 31, 2021 includes a recovery of $17 of restructuring and other charges which are discussed in Note 5.

[2] The quarter ended September 30, 2021 includes $51 of restructuring and other charges which are discussed in Note 5.

[3] The quarter ended June 30, 2021 includes $197 of restructuring and other charges which are discussed in Note 5.

[4] The quarter ended March 31, 2021 includes $55 of restructuring and other charges which are discussed in Note 5.