Note E - Business Segments - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020	Apr. 04, 2021	Dec. 31, 2020
External net sales	$ 87,118	$ 87,132	$ 168,145	$ 152,768
Gross profit (loss)	17,675	21,743	36,036	37,860
Operating profit (loss)	11,330	15,329	22,273	24,592
Total assets	406,535	406,320	406,535	406,320	$ 402,661	$ 433,170
Depreciation and amortization	734	746	1,465	1,500
Capital expenditures	832	376	1,956	733
Housewares/Small Appliances [Member] | Operating Segments [Member]
External net sales	23,200	26,044	49,705	45,856
Gross profit (loss)	1,300	5,459	6,091	8,723
Operating profit (loss)	(1,593)	2,408	(632)	2,354
Total assets	208,250	213,866	208,250	213,866
Depreciation and amortization	302	242	593	479
Capital expenditures	210	119	340	325
Defense [Member] | Operating Segments [Member]
External net sales	63,799	61,030	118,254	106,810
Gross profit (loss)	16,607	16,666	30,511	29,913
Operating profit (loss)	14,111	14,256	25,356	24,925
Total assets	175,369	172,314	175,369	172,314
Depreciation and amortization	374	430	755	861
Capital expenditures	611	170	1,510	321
Safety [Member] | Operating Segments [Member]
External net sales	119	58	186	102
Gross profit (loss)	(232)	(382)	(566)	(776)
Operating profit (loss)	(1,188)	(1,335)	(2,451)	(2,687)
Total assets	22,916	20,140	22,916	20,140
Depreciation and amortization	58	74	117	160
Capital expenditures	$ 11	$ 87	$ 106	$ 87