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Note 5 - Business Acquisitions (Details Textual)
$ in Thousands
 3 Months Ended 4 Months Ended 6 Months Ended
May 31, 2022
USD ($)
shares
Dec. 31, 2021
USD ($)
Aug. 31, 2021
USD ($)
shares
Apr. 29, 2021
USD ($)
Sep. 24, 2022
USD ($)
Sep. 25, 2021
USD ($)
Sep. 24, 2022
USD ($)
Sep. 24, 2022
USD ($)
Sep. 25, 2021
USD ($)
Revenues, Total [1]         $ 56,439 $ 50,387   $ 111,100 $ 98,177
Operating Income (Loss), Total         3,626 $ 3,578   7,230 7,267
General and Administrative Expense [Member]                  
Business Combination, Acquisition Related Costs               100 100
Alliance [Member]                  
Revenues, Total             $ 700    
Operating Income (Loss), Total             $ 100    
Tangent [Member]                  
Revenues, Total               1,100  
Operating Income (Loss), Total               100  
Alliance [Member]                  
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) 15 years                
Business Combination, Consideration Transferred, Total $ 4,700                
Payments to Acquire Businesses, Gross $ 4,000                
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares 2,284                
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable $ 100                
Business Combination, Consideration Held Back 500                
Business Combination, Consideration Subject to Reduction $ 500                
Tangent [Member]                  
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)   15 years              
Business Combination, Consideration Transferred, Total   $ 8,900              
Payments to Acquire Businesses, Gross   7,900              
Escrow Deposit   $ 1,000              
Cash Out of Escrow Account         $ 200        
NEXA [Member]                  
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)     5 years            
Business Combination, Consideration Transferred, Total     $ 26,200            
Payments to Acquire Businesses, Gross     $ 23,900            
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares     34,943            
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable     $ 2,400            
Revenues, Total               6,300  
Operating Income (Loss), Total               100  
Escrow Deposit     100            
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High     $ 7,500            
Business Combination, Contingent Consideration Arrangements, Period (Year)     4 years            
Business Combination, Contingent Consideration, Liability, Total     $ 200            
NEXA [Member] | Measurement Input, Cost to Sell [Member]                  
Business Combination, Contingent Consideration, Liability, Measurement Input     0.0660            
NEXA [Member] | Measurement Input, Risk Free Interest Rate [Member]                  
Business Combination, Contingent Consideration, Liability, Measurement Input     0.0058            
NEXA [Member] | Measurement Input, Price Volatility [Member]                  
Business Combination, Contingent Consideration, Liability, Measurement Input     0.2000            
Upstate Metrology [Member]                  
Business Combination, Consideration Transferred, Total       $ 900          
Business Combination, Other Holdback Amounts       $ 600          
Payment for Contingent Consideration Liability, Financing Activities               $ 0 $ 0
[1] Revenues are attributed to the countries based on the destination of a product shipment or the location where service is rendered.