Note 5 - Business Acquisitions (Details Textual) € in Thousands, $ in Thousands								3 Months Ended
		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 ($) shares	Jun. 24, 2023 USD ($)	Jun. 24, 2023 USD ($)	Dec. 24, 2022 USD ($)	Jun. 25, 2022 USD ($)	Mar. 25, 2023 USD ($)
Revenues	[1]								$ 60,598		$ 54,661
Operating Income (Loss)									4,640		3,604
Business Combination, Contingent Consideration, Liability, Current								$ 0	0
Unpaid Amounts for Other Holdbacks								$ 100	100
Payment for Contingent Consideration Liability, Financing Activities									0		0
Payments for Other Holdbacks									300		0
General and Administrative Expense [Member]
Business Combination, Acquisition Related Costs									200		100
Complete Calibrations [Member]
Revenues									100
Operating Income (Loss)									$ 100
Foreign Currency Exchange Rate, Translation								1.0895	1.0895
TIC-MS, Inc. [Member]
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)		15 years
Business Combination, Consideration Transferred		$ 9,800
Payments to Acquire Businesses, Gross		2,900
Escrow Deposit		$ 500
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares		77,387
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 6,800
Revenues								$ 900
Operating Income (Loss)								$ 400
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				$ 3,270	€ 3,000
Technology License Agreement, Term (Year)				10 years	10 years
Cumulative License Revenue				$ 820	€ 750
Annual Royalty Fee, Amount				$ 110	€ 100
e2b [Member]
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)						15 years
Payments to Acquire Businesses, Gross						$ 3,100
Escrow Deposit												$ 300
Revenues											800
Operating Income (Loss)											100
Business Combination, Consideration Held Back						$ 900
Escrow Released to Sellers										$ 600
Alliance [Member]
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)							15 years
Business Combination, Consideration Transferred							$ 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
Revenues											600
Business Combination, Consideration Held Back							500
Business Combination, Consideration Subject to Reduction							$ 500
Cash Out of Escrow Account											$ 200

[1] Revenues are attributed to the countries based on the destination of a product shipment or the location where service is rendered.