Note A - Summary of Significant Accounting Policies 1 (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts Payable, Other, Current	$ 3,067,000	$ 5,471,000
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale	26,891,000	46,243,000	$ 29,195,000
Debt Securities, Available-for-Sale, Realized Gain (Loss)	0	0	0
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax	17,000	158,000	156,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0	0	0
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One	4,469,000
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	496,000
Property, Plant and Equipment, Gross	114,534,000	107,010,000
Depreciation	3,531,000	4,372,000	2,765,000
Goodwill, Impairment Loss	0	0	3,832,000
Goodwill	$ 19,433,000	19,433,000
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]	Goodwill and Intangible Asset Impairment
Impairment of Intangible Assets (Excluding Goodwill)	$ 0	0
Amortization of Intangible Assets	1,515,000	1,635,000	582,000
Contract with Customer, Liability, Current	7,345,000	13,666,000
Advertising Expense	$ 251,000	226,000	209,000
Initial Product Return Period (Day)	60 days
Accounts Payable and Accrued Liabilities [Member]
Contract with Customer, Liability, Current	$ 7,345,000	13,666,000
Defense [Member]
Goodwill, Impairment Loss	0	0
Goodwill	19,433,000	19,433,000
Goodwill, Non-deductible for Income Tax Purposes	7,948,000	7,948,000
Contract with Customer, Liability, Revenue Recognized	9,564,000	326,000	0
Revenue, Remaining Performance Obligation, Amount		564,005,000
Safety [Member]
Impairment of Intangible Assets (Excluding Goodwill)			$ 1,463,000
Housewares/Small Appliances [Member]
Materials, Supplies, and Other	2,929,000	5,018,000
Building [Member] | Defense [Member]
Construction in Progress, Gross	5,354,000	$ 642,000
Leased Manufacturing and Office Space [Member]
Property, Plant and Equipment, Gross	$ 6,039,000
Minimum [Member]
Accounts Receivable, Collection Period (Day)	25 days
Finite-Lived Intangible Asset, Useful Life (Year)	2 years
Revenue Contract Period (Month)	3 months
Minimum [Member] | Housewares/Small Appliances [Member]
Standard Product Warranty, Coverage Period (Year)	1 year
Minimum [Member] | Building [Member]
Property, Plant and Equipment, Useful Life (Year)	15 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Minimum [Member] | Land Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	15 years
Maximum [Member]
Accounts Receivable, Collection Period (Day)	60 days
Finite-Lived Intangible Asset, Useful Life (Year)	15 years
Revenue Contract Period (Month)	24 months
Maximum [Member] | Housewares/Small Appliances [Member]
Standard Product Warranty, Coverage Period (Year)	12 years
Maximum [Member] | Building [Member]
Property, Plant and Equipment, Useful Life (Year)	40 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Maximum [Member] | Land Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	20 years