Note 7 - Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Net Carrying Amount	$ 18,894	$ 21,634
Finite-lived, Gross Carrying Amount	20,506	21,015
Finite-lived, Accumulated Amortization	9,938	7,809
Net Carrying Amount, finite-lived	10,568	13,206
Indefinite-lived, Gross Carrying Amount	8,326	8,428
Net Carrying Amount, indefinite-lived	8,326	8,428
Intangible Assets, Gross Carrying Amount	28,832	29,443
Net Carrying Amount	18,894	21,634
Trademarks [Member]
Indefinite-lived, Gross Carrying Amount	8,326	8,428
Net Carrying Amount, indefinite-lived	8,326	8,428
Customer Relationships [Member]
Finite-lived, Gross Carrying Amount	16,211	16,544
Finite-lived, Accumulated Amortization	7,564	6,160
Net Carrying Amount, finite-lived	8,647	10,384
Patented Technology [Member]
Finite-lived, Gross Carrying Amount	2,812	2,950
Finite-lived, Accumulated Amortization	892	569
Net Carrying Amount, finite-lived	1,920	2,381
Patents [Member]
Finite-lived, Gross Carrying Amount	590	590
Finite-lived, Accumulated Amortization	589	585
Net Carrying Amount, finite-lived	1	5
Customer Backlog [Member]
Finite-lived, Gross Carrying Amount	483	521
Finite-lived, Accumulated Amortization	483	85
Net Carrying Amount, finite-lived	0	436
Computer Software, Intangible Asset [Member]
Finite-lived, Gross Carrying Amount	270	270
Finite-lived, Accumulated Amortization	270	270
Net Carrying Amount, finite-lived	0	0
Trade Names [Member]
Finite-lived, Gross Carrying Amount	140	140
Finite-lived, Accumulated Amortization	140	140
Net Carrying Amount, finite-lived	0	0
Electronic Test [Member]
Net Carrying Amount	4,183	5,074
Net Carrying Amount	4,183	5,074
Environmental Technologies [Member]
Net Carrying Amount	847	893
Net Carrying Amount	847	893
Process Technologies [Member]
Net Carrying Amount	13,864	15,667
Net Carrying Amount	$ 13,864	$ 15,667