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Note 1 - Condensed Consolidated Financial Statements (Details Textual)
$ / shares in Units, $ in Thousands
 3 Months Ended
Oct. 30, 2024
USD ($)
Jan. 25, 2024
USD ($)
shares
Mar. 23, 2023
$ / shares
Mar. 31, 2025
USD ($)
$ / shares
shares
Mar. 31, 2024
USD ($)
Dec. 31, 2024
$ / shares
shares
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   342,080
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]          
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     $ 0.6 $ 0.6   $ 0.6
Number of Reportable Segments       1    
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          
Debt Instrument, Basis Spread on Variable Rate 2.50%          
Debt Instrument, Borrowing Base, Percentage of Eligible Commercial Accounts Receivable 80.00%          
Debt Instrument, Borrowing Base, Percentage of Federal Government Accounts Receivable 50.00%          
Debt Instrument, Borrowing Base, Percentage of Eligible Finished Goods Inventory 50.00%          
Short-Term Debt       $ 0    
Debt Instrument, Covenant, Total Funded Debt Ratio 2          
Debt Instrument, Covenant, Fixed Charge Ratio 1.2          
FG Holdings LLC. [Member]            
Realized Investment Gains (Losses)   $ (91)