Note 1 - Organization and Significant Accounting Policies (Details Textual)		1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 07, 2024 USD ($)	Feb. 07, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Number of Operating Segments				2
Standard and Extended Product Warranty Accrual			$ 805,000	$ 805,000	$ 690,000
Product Warranty Expense				$ 350,000	251,000
Multi Employer Plans Collective Bargaining Arrangement Number of Participants				406
Multiemployer Plan, Employees Covered by Collective-Bargaining Arrangement, Subject to Expiration in 12 Months			0	0
Net Income (Loss) Attributable to Parent				$ 1,596,000	2,494,000
Net Cash Provided by (Used in) Operating Activities				11,089,000	(13,793,000)
Inventory, Net			$ 77,314,000	77,314,000	$ 42,133,000
Gill Family Capital Management [Member] | Promissory Notes With Maturity On April 1, 2024 And April 1, 2026 [Member]
Debt Instrument, Increase (Decrease), Net			2,500,000
Subordinated Debt			6,500,000	6,500,000
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	$ 2,500,000	$ 5,000,000
Subordinated Debt	9,000,000	9,000,000
Gill Family Capital Management [Member] | Promissory Notes With Maturity on April 1, 2025 [Member]
Subordinated Debt			2,000,000	2,000,000
Gill Family Capital Management [Member] | Promissory Note With Maturity On April 1, 2026 [Member]
Subordinated Debt			2,000,000	2,000,000
Gill Family Capital Management [Member] | Promissory Notes With Maturity On April 1, 2027 [Member]
Subordinated Debt			2,500,000	$ 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	2,500,000
Subordinated Debt	$ 5,000,000	$ 5,000,000
Employee Benefit Related Adjustments Mexico [Member]
Multi Employer Plans Collective Bargaining Arrangement Number of Participants				382
Multiemployer Plan, Pension, Significant, Employees Covered by Collective-Bargaining Arrangement to All Entity's Employees, Percentage				54.00%
Multiemployer Plan, Pension, Significant, Employees Covered by Collective-Bargaining Arrangement to All Participants, Percentage				51.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage				30.00%
Number of Major Customers				2
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Subcom [Member]
Concentration Risk, Percentage				16.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Detroit Diesel [Member]
Concentration Risk, Percentage				14.00%	18.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Three Customers [Member]
Concentration Risk, Percentage					31.00%
Number of Major Customers					2
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer ADI [Member]
Concentration Risk, Percentage					13.00%
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				13.00%	18.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer Sistemas [Member]
Concentration Risk, Percentage				22.00%	22.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Northrop Grumman [Member]
Concentration Risk, Percentage				17.00%	14.00%
Capitalized Implementation Costs [Member]
Prepaid Expense and Other Assets			$ 156,000	$ 156,000	$ 204,000