Note 5 - Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Goodwill	$ 34,868	$ 21,728
Net Carrying Amount	27,058	16,596
Finite-lived, Gross Carrying Amount	30,805	20,801
Finite-lived, Accumulated Amortization	14,038	12,603
Net Carrying Amount, finite-lived	16,767	8,198
Indefinite-lived, Gross Carrying Amount	10,291	8,398
Net Carrying Amount, indefinite-lived	10,291	8,398
Intangible Assets, Gross Carrying Amount	41,096	29,199
Net Carrying Amount	27,058	16,596
Trademarks [Member]
Indefinite-lived, Gross Carrying Amount	10,291	8,398
Net Carrying Amount, indefinite-lived	10,291	8,398
Customer Relationships [Member]
Finite-lived, Gross Carrying Amount	22,613	16,407
Finite-lived, Accumulated Amortization	10,577	9,687
Net Carrying Amount, finite-lived	12,036	6,720
Patented Technology [Member]
Finite-lived, Gross Carrying Amount	5,737	2,895
Finite-lived, Accumulated Amortization	1,681	1,417
Net Carrying Amount, finite-lived	4,056	1,478
Patents [Member]
Finite-lived, Gross Carrying Amount	590	590
Finite-lived, Accumulated Amortization	590	590
Net Carrying Amount, finite-lived	0	0
Customer Backlog [Member]
Finite-lived, Gross Carrying Amount	1,455	499
Finite-lived, Accumulated Amortization	780	499
Net Carrying Amount, finite-lived	675	0
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]
Goodwill	16,631	3,436
Net Carrying Amount	14,986	3,728
Net Carrying Amount	14,986	3,728
Environmental Technologies [Member]
Goodwill	1,817	1,817
Net Carrying Amount	787	794
Net Carrying Amount	787	794
Process Technologies [Member]
Goodwill	16,420	16,475
Net Carrying Amount	11,285	12,074
Net Carrying Amount	$ 11,285	$ 12,074