Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2020
Accounts Receivable, after Allowance for Credit Loss	$ 8,138,000	$ 4,894,000
Accounts Receivable, Allowance for Credit Loss, Current	46,000	35,000
Inventory Valuation Reserves	384,000	416,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,947,000)	(1,499,000)
Advertising Expense	48,000	65,000
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense	55,000	59,000
Restricted Stock [Member]
Share-Based Payment Arrangement, Expense	$ 485,000	$ 404,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period	32,330	29,675
The2004 Plan Member
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	0	0	5,009,750
Incentive Plan 2020 [Member] \| Restricted Stock [Member]
Share-Based Payment Arrangement, Expense	$ 485,000	$ 404,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period	32,330	29,675
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	5 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	17 years

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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