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Note 5 - Business Acquisitions (Details Textual)
$ / shares in Units, € in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended
Dec. 23, 2023
USD ($)
Aug. 08, 2023
USD ($)
Jul. 12, 2023
USD ($)
Mar. 27, 2023
USD ($)
shares
Feb. 02, 2023
USD ($)
Sep. 28, 2022
USD ($)
Sep. 28, 2022
EUR (€)
Sep. 27, 2022
USD ($)
May 31, 2022
USD ($)
shares
Dec. 23, 2023
USD ($)
Jun. 24, 2023
USD ($)
Dec. 24, 2022
USD ($)
Sep. 23, 2023
USD ($)
$ / shares
Dec. 31, 2023
USD ($)
Dec. 23, 2023
USD ($)
Dec. 24, 2022
USD ($)
Sep. 23, 2022
USD ($)
Aug. 31, 2021
USD ($)
Revenues [1]                   $ 65,166   $ 57,402     $ 188,568 $ 168,502    
Operating Income (Loss)                   4,294   3,163     10,577 10,393    
Share-Based Payment Arrangement, Expense                             3,300 2,800    
Other Expense [Member]                                    
Payments for Other Holdbacks                             800 0    
General and Administrative Expense [Member]                                    
Business Combination, Acquisition Related Costs                             700 $ 100    
Current Liabilities [Member]                                    
Business Combination, Contingent Consideration, Liability, Current $ 1,000                 1,000         1,000      
Unpaid Amounts for Other Holdbacks 2,700                 2,700         2,700      
Other Liabilities [Member]                                    
Business Combination, Contingent Consideration, Liability, Current 2,400                 2,400         2,400      
Unpaid Amounts for Other Holdbacks $ 1,600                 $ 1,600         1,600      
Complete Calibrations [Member]                                    
Revenues                             $ 300      
Foreign Currency Exchange Rate, Translation 1.1014                 1.1014         1.1014      
Operating Income (Loss)                             $ 100      
Axiom [Member]                                    
Business Combination, Consideration Transferred   $ 38,600                                
Payments to Acquire Businesses, Gross   10,000                                
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable   28,600                                
Business Combination, Payment Withheld for Potential Post-closing Adjustments   $ 3,900                                
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual                   $ 4,300                
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual                   400                
SteriQual, Inc. [Member]                                    
Business Combination, Consideration Transferred $ 3,800   $ 4,300                              
Business Combination, Consideration Held Back     900                              
Business Combination, Consideration Subject to Reduction     $ 500 $ 500                            
Revenues                   1,900                
Cash Out of Escrow Account                   100                
TIC-MS, Inc. [Member]                                    
Business Combination, Consideration Transferred       9,800                            
Payments to Acquire Businesses, Gross       2,900                            
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable       $ 6,900                            
Revenues                   2,700                
Cash Out of Escrow Account                   1,100                
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)       15 years                            
Escrow Deposit       $ 500                            
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares       77,387                            
TIC-MS, Inc. [Member] | Scenario, Adjustment [Member]                                    
Business Combination, Potential Purchase Price Adjustment for Failure to Retain Key Customer Relationships       $ 500                            
Elite [Member]                                    
Business Combination, Consideration Transferred         $ 900                          
Payments to Acquire Businesses, Gross         800                          
Business Combination, Payment Withheld for Potential Post-closing Adjustments         $ 100                          
Complete Calibrations [Member]                                    
Payments to Acquire Businesses, Gross           $ 1,200                        
Complete Calibrations [Member] | Technology License Agreement [Member]                                    
Royalties Per Technology Calibration           $ 3,190 € 3,000                      
Technology License Agreement, Term (Year)           10 years 10 years                      
Cumulative License Revenue           $ 800 € 750                      
Annual Royalty Fee, Amount           $ 110 € 100                      
e2b [Member]                                    
Payments to Acquire Businesses, Gross               $ 3,100                    
Business Combination, Consideration Held Back               $ 900                    
Revenues                             2,600      
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)               15 years                    
Escrow Deposit 0                 0         0      
Operating Income (Loss)                             400      
Escrow Released to Sellers                   300   $ 600            
Alliance [Member]                                    
Business Combination, Consideration Transferred                 $ 4,700                  
Payments to Acquire Businesses, Gross                 4,000                  
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable                 100                  
Business Combination, Consideration Held Back                 500                  
Business Combination, Consideration Subject to Reduction                 $ 500   $ 500              
Revenues                             2,000      
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)                 15 years                  
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares                 2,284                  
Operating Income (Loss)                             600      
NEXA [Member]                                    
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High                         $ 7,100       $ 400 $ 7,500
Business Combination, Contingent Consideration, Maximum Price Per Share for Cash Earn Out Payment (in dollars per share) | $ / shares                         $ 45.07          
Business Combination, Contingent Consideration, Liability $ 2,900                 $ 2,900     $ 2,800   $ 2,900      
Share-Based Payment Arrangement, Expense                         $ 2,800 $ 100        
NEXA [Member] | Measurement Input, Cost to Sell [Member]                                    
Business Combination, Contingent Consideration, Liability, Measurement Input                         9          
NEXA [Member] | Measurement Input, Risk Free Interest Rate [Member]                                    
Business Combination, Contingent Consideration, Liability, Measurement Input                         5          
NEXA [Member] | Measurement Input, Price Volatility [Member]                                    
Business Combination, Contingent Consideration, Liability, Measurement Input                         25          
[1] Revenues are attributed to the countries based on the destination of a product shipment or the location where service is rendered.