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Note 1 - Organization and Significant Accounting Policies (Details Textual)	3 Months Ended			6 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jan. 01, 2025 USD ($)
Number of Operating Segments					2
Standard and Extended Product Warranty Accrual			$ 805,000		$ 850,000	$ 805,000
Product Warranty Expense					$ 435,000	350,000
Multi Employer Plans Collective Bargaining Arrangement Number of Participants					356
Multiemployer Plan, Employees Covered by Collective-Bargaining Arrangement, Subject to Expiration in 12 Months					26
Net Income (Loss) Attributable to Parent					$ (1,680,000)	(1,596,000)
Net Cash Provided by (Used in) Operating Activities					2,004,000	$ (11,089,000)
Gill Family Capital Management [Member] | Promissory Notes With Maturity On April 1, 2024 And April 1, 2026 [Member]
Debt Instrument, Increase (Decrease), Net			$ 2,000,000	$ 5,000,000	2,500,000
Subordinated Debt					9,000,000
Gill Family Capital Management [Member] | Promissory Notes With Maturity On April 1, 2024 And April 1, 2026 [Member] | Subsequent Event [Member]
Debt Instrument, Increase (Decrease), Net	$ 3,000,000
Gill Family Capital Management [Member] | Promissory Notes With Maturity On April 1, 2029 [Member] | Subsequent Event [Member]
Subordinated Debt							$ 3,000,000
Gill Family Capital Management [Member] | Promissory Notes With Maturity On April 1, 2029 [Member] | Forecast [Member]
Debt Instrument, Increase (Decrease), Net	3,000,000
Gill Family Capital Management [Member] | Promissory Note With Maturity On April 1, 2026 [Member]
Subordinated Debt					$ 2,000,000
Gill Family Capital Management [Member] | Promissory Note With Maturity On April 1, 2026 [Member] | Subsequent Event [Member]
Subordinated Debt							2,000,000
Gill Family Capital Management [Member] | Promissory Notes With Maturity on April 1, 2027 [Member]
Debt Instrument, Increase (Decrease), Net		$ 2,500,000
Gill Family Capital Management [Member] | Promissory Notes With Maturity on April 1, 2027 [Member] | Subsequent Event [Member]
Debt Instrument, Increase (Decrease), Net	$ 3,000,000
Subordinated Debt							2,000,000
Gill Family Capital Management [Member] | Promissory Notes With Maturity on April 1, 2028 [Member] | Subsequent Event [Member]
Subordinated Debt							$ 5,000,000
Employee Benefit Related Adjustments Mexico [Member]
Multi Employer Plans Collective Bargaining Arrangement Number of Participants					330
Multiemployer Plan, Pension, Significant, Employees Covered by Collective-Bargaining Arrangement to All Entity's Employees, Percentage					50.00%
Multiemployer Plan, Pension, Significant, Employees Covered by Collective-Bargaining Arrangement to All Participants, Percentage					46.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Three Customers [Member]
Concentration Risk, Percentage					37.00%
Number of Major Customers					3
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Sisamex [Member]
Concentration Risk, Percentage					14.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Subcom [Member]
Concentration Risk, Percentage					12.00%	16.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Detroit Diesel [Member]
Concentration Risk, Percentage					11.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage						31.00%
Number of Major Customers						2
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Gastech Engineering, LLC [Member]
Concentration Risk, Percentage						14.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer Subcom [Member]
Concentration Risk, Percentage						10.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer Detroit Diesel [Member]
Concentration Risk, Percentage					11.00%	13.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Northrop Grumman [Member]
Concentration Risk, Percentage					23.00%	17.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer Sistemas [Member]
Concentration Risk, Percentage					21.00%	22.00%

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The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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