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Note 9 - Business Acquisitions (Details Textual) € in Thousands, $ in Thousands										2 Months Ended	3 Months Ended			6 Months Ended		10 Months Ended	12 Months Ended
	Feb. 02, 2023 USD ($)	Sep. 28, 2022 USD ($)	Sep. 28, 2022 EUR (€)	Sep. 27, 2022 USD ($)	May 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($)	Aug. 31, 2021 USD ($) shares	Apr. 29, 2021 USD ($)	Dec. 16, 2020 USD ($)	Mar. 25, 2023 USD ($)	Mar. 25, 2023 USD ($)	Dec. 24, 2022 USD ($)	Sep. 24, 2022 USD ($)	Mar. 25, 2023 USD ($)	Mar. 25, 2023 USD ($)	Mar. 25, 2023 USD ($)	Mar. 25, 2023 USD ($)	Mar. 26, 2022 USD ($)	Mar. 27, 2021 USD ($)	Aug. 31, 2022 USD ($)
Revenues																	$ 230,569	$ 204,959	$ 173,335
Operating Income (Loss)																	16,248	14,143	11,073
Payment for Contingent Consideration Liability, Financing Activities																	0	0	0
General and Administrative Expense [Member]
Business Combination, Acquisition Related Costs																	200	900	$ 100
Current Liabilities [Member]
Business Combination, Contingent Consideration, Liability, Current										$ 0	$ 0			$ 0	$ 0	$ 0	0	200
Unpaid Amounts for Other Holdbacks										600	600			600	600	600	600	100
Elite [Member]
Revenues										100
Complete Calibrations [Member]
Revenues														200
Operating Income (Loss)														100
e2b [Member]
Revenues															1,800
Operating Income (Loss)															300
Alliance [Member]
Revenues																2,000
Operating Income (Loss)																300
Tangent [Member]
Revenues																	2,400
Operating Income (Loss)																	300
NEXA [Member]
Revenues																	13,200
Operating Income (Loss)																	100
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
Foreign Currency Exchange Rate, Translation		1.0762	1.0762
Complete Calibrations [Member] | Technology License Agreement [Member]
Royalties Per Technology Calibration		$ 3,230	€ 3,000
Technology License Agreement, Term (Year)		10 years	10 years
Cumulative License Revenue		$ 810	€ 750
Annual Royalty Fee, Amount		$ 110	€ 100
e2b [Member]
Payments to Acquire Businesses, Gross				$ 3,100
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)				15 years
Business Combination, Consideration Held Back				$ 900
Escrow Released to Sellers												$ 600
Escrow Deposit										300	300			300	300	300	300
Alliance [Member]
Business Combination, Consideration Transferred					$ 4,700
Payments to Acquire Businesses, Gross					$ 4,000
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)					15 years
Business Combination, Consideration Held Back					$ 500
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 Subject to Reduction					$ 500
Tangent [Member]
Business Combination, Consideration Transferred						$ 8,900
Payments to Acquire Businesses, Gross						$ 7,900
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)						15 years
Escrow Deposit						$ 1,000							$ 300
Cash Out of Escrow Account											200		$ 200
NEXA [Member]
Business Combination, Consideration Transferred							$ 26,200
Payments to Acquire Businesses, Gross							$ 23,900
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)							5 years
Escrow Deposit							$ 100
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
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High							$ 7,500			$ 7,500	$ 7,500			$ 7,500	$ 7,500	$ 7,500	$ 7,500
Business Combination, Contingent Consideration Arrangements, Period (Year)							4 years										4 years
Business Combination, Contingent Consideration, Liability							$ 200											$ 200		$ 0
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								$ 900
Bio Tek Services Inc [Member]
Business Combination, Consideration Transferred									$ 3,500
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)									10 years
Escrow Deposit									$ 400

X

- Definition

The amount of annual royalty fee.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

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Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability up to amount recognized at acquisition date, including, but not limited to, measurement period adjustment and less amount paid soon after acquisition date.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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