Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands						12 Months Ended
	Oct. 30, 2024 USD ($)	Jan. 25, 2024 USD ($) shares	Nov. 22, 2023	Mar. 23, 2023	Nov. 22, 2022 USD ($)	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares
Number of Financial Institutions						1
Cash, Uninsured Amount						$ 6,825
Treasury Stock, Shares, Acquired (in shares) | shares		52,000
Treasury Stock, Value, Acquired, Cost Method		$ 650				$ 651
Treasury Stock, Common, Shares (in shares) | shares		342,080				342,080	290,080
Operating Income (Loss)						$ 7,828	$ (777)
Advertising Expense						496	478
Research and Development Expense						$ 7,841	$ 9,334
Product Warranty Obligation, Term (Year)						2 years	5 years
Number of Reportable Segments						1
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense						$ 494	$ 1,143
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio				5
Fifth Third Credit Agreement [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Expiration Period (Year)	1 year
Line of Credit Facility, Maximum Borrowing Capacity	$ 6,000
Line of Credit Facility, Maximum Borrowing Capacity, Accordion Feature	4,000
Line of Credit Facility, Maximum Borrowing Capacity, Including Accordion Feature, Total	$ 10,000
Alterna Capital Solutions, LLC [Member] | Invoice Purchase and Security Agreement [Member]
Line of Credit Facility, Expiration Period (Year)			1 year		1 year
Line of Credit Facility, Maximum Borrowing Capacity					$ 15,000
FG Holdings LLC. [Member]
Realized Investment Gains (Losses)		$ (91)
Supplier Concentration Risk [Member] | Cost of Goods and Service Benchmark [Member] | Non-US [Member]
Concentration Risk, Percentage						17.00%	16.00%
Number of Major Suppliers						7	12
Supplier Concentration Risk [Member] | Cost of Goods and Service Benchmark [Member] | Non-US [Member] | Seven Suppliers [Member]
Concentration Risk, Percentage						79.90%
Supplier Concentration Risk [Member] | Cost of Goods and Service Benchmark [Member] | Non-US [Member] | Twelve Suppliers [Member]
Concentration Risk, Percentage							94.80%
United States Government Agencies [Member]
Accounts Receivable, after Allowance for Credit Loss						$ 600	$ 1,445
Minimum [Member]
Product Warranty Obligation, Term (Year)						2 years
Maximum [Member]
Product Warranty Obligation, Term (Year)						5 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)						3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)						10 years
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)						5 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)						8 years