Note E - Business Segments - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020	Dec. 31, 2020
External net sales	$ 81,027	$ 65,636
Gross profit (loss)	18,361	16,117
Operating profit (loss)	10,943	9,263
Total assets	395,231	383,659	$ 433,170
Depreciation and amortization	731	754
Capital expenditures	1,124	357
Housewares/Small Appliances [Member] | Operating Segments [Member]
External net sales	26,505	19,812
Gross profit (loss)	4,791	3,264
Operating profit (loss)	961	(54)
Total assets	203,865	198,769
Depreciation and amortization	292	237
Capital expenditures	130	206
Defense [Member] | Operating Segments [Member]
External net sales	54,455	45,780
Gross profit (loss)	13,904	13,247
Operating profit (loss)	11,245	10,669
Total assets	168,502	165,317
Depreciation and amortization	381	431
Capital expenditures	899	151
Safety [Member] | Operating Segments [Member]
External net sales	67	44
Gross profit (loss)	(334)	(394)
Operating profit (loss)	(1,263)	(1,352)
Total assets	22,864	19,573
Depreciation and amortization	58	86
Capital expenditures	$ 95	$ 0