Note 2 - Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Net revenues	$ 79,728	$ 75,727	$ 226,630	$ 233,869
Test & Measurement Sector [Member]
Net revenues	16,829	14,337	46,442	43,955
Avionics, Military & Space Sector [Member]
Net revenues	7,262	8,581	19,918	21,769
Transportation Sector [Member]
Net revenues	14,724	12,802	45,651	38,985
Other Markets [Member]
Net revenues	14,352	14,826	42,415	48,750
Industrial Weighing Sector [Member]
Net revenues	9,083	8,578	26,742	28,021
General Industrial Sector [Member]
Net revenues	5,720	4,538	15,326	14,702
Steel Sector [Member]
Net revenues	11,758	12,065	30,136	37,687
Sensors Segment [Member]
Net revenues	31,625	28,201	85,243	86,483
Weighing Solutions Segment [Member]
Net revenues	27,537	25,174	83,404	81,467
Measurement Systems Segment [Member]
Net revenues	20,566	22,352	57,983	65,919
UNITED STATES
Net revenues	35,931	35,973	105,814	102,626
UNITED STATES \| Sensors Segment [Member]
Net revenues	13,685	10,068	34,918	29,931
UNITED STATES \| Weighing Solutions Segment [Member]
Net revenues	11,665	11,154	35,320	33,491
UNITED STATES \| Measurement Systems Segment [Member]
Net revenues	10,581	14,751	35,576	39,204
Europe [Member]
Net revenues	24,512	18,870	67,130	66,964
Europe [Member] \| Sensors Segment [Member]
Net revenues	8,363	7,475	23,879	24,936
Europe [Member] \| Weighing Solutions Segment [Member]
Net revenues	12,778	11,017	38,690	38,489
Europe [Member] \| Measurement Systems Segment [Member]
Net revenues	3,371	378	4,561	3,539
Asia [Member]
Net revenues	11,218	10,158	31,161	32,370
Asia [Member] \| Sensors Segment [Member]
Net revenues	5,492	5,479	15,400	16,378
Asia [Member] \| Weighing Solutions Segment [Member]
Net revenues	3,043	2,901	9,240	9,119
Asia [Member] \| Measurement Systems Segment [Member]
Net revenues	2,683	1,778	6,521	6,873
CANADA
Net revenues	3,931	5,445	11,347	16,404
CANADA \| Sensors Segment [Member]
Net revenues	0	0	0	0
CANADA \| Weighing Solutions Segment [Member]
Net revenues	0	0	22	101
CANADA \| Measurement Systems Segment [Member]
Net revenues	3,931	5,445	11,325	16,303
ISRAEL
Net revenues	4,136	5,281	11,178	15,505
ISRAEL \| Sensors Segment [Member]
Net revenues	4,085	5,179	11,046	15,238
ISRAEL \| Weighing Solutions Segment [Member]
Net revenues	51	102	132	267
ISRAEL \| Measurement Systems Segment [Member]
Net revenues	$ 0	$ 0	$ 0	$ 0