Note 5 - Business Acquisitions (Details Textual) $ / shares in Units, € in Thousands, $ in Thousands									2 Months Ended		3 Months Ended				6 Months Ended
	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 ($) shares	Sep. 23, 2023 USD ($) $ / shares	Sep. 23, 2023 USD ($) $ / shares	Sep. 23, 2023 USD ($) $ / shares	Jun. 24, 2023 USD ($)	Dec. 24, 2022 USD ($)	Sep. 24, 2022 USD ($)	Sep. 23, 2023 USD ($) $ / shares	Sep. 23, 2023 USD ($) $ / shares	Sep. 24, 2022 USD ($)	Sep. 23, 2022 USD ($)	Aug. 31, 2021 USD ($)
Revenues											$ 62,804			$ 56,439		$ 123,402	$ 111,100
Operating Income (Loss)											1,643			$ 3,626		6,283	7,230
Share-Based Payment Arrangement, Expense																2,200	1,900
Business Combination, Contingent Consideration, Liability, Current									$ 900	$ 900	900				$ 900	900
Unpaid Amounts for Other Holdbacks									$ 2,500	$ 2,500	$ 2,500				$ 2,500	2,500
Payment for Contingent Consideration Liability, Financing Activities																2,400
Payments for Other Holdbacks																1,600	0
Other Expense [Member]
Payment for Contingent Consideration Liability, Financing Activities												$ 0
Payments for Other Holdbacks																300
General and Administrative Expense [Member]
Business Combination, Acquisition Related Costs																500	$ 100
Complete Calibrations [Member]
Revenues																$ 200
Foreign Currency Exchange Rate, Translation									1.0646	1.0646	1.0646				1.0646	1.0646
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									$ 1,400
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual									100
SteriQual, Inc. [Member]
Business Combination, Consideration Transferred		$ 4,300
Business Combination, Consideration Held Back		900
Business Combination, Consideration Subject to Reduction		$ 500	$ 500
Revenues										$ 700
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															$ 1,700
Cash Out of Escrow Account															700
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																1,800
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)							15 years
Escrow Deposit									300	300	$ 300				300	300
Operating Income (Loss)																200
Escrow Released to Sellers													$ 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																1,300
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)																400
NEXA [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High									$ 7,100	$ 7,100	$ 7,100				$ 7,100	$ 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	$ 45.07	$ 45.07				$ 45.07	$ 45.07
Business Combination, Contingent Consideration, Liability									$ 2,800	$ 2,800	$ 2,800				$ 2,800	$ 2,800
Share-Based Payment Arrangement, Expense																$ 2,800
NEXA [Member] | Measurement Input, Cost to Sell [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input									9.00	9.00	9.00				9.00	9.00
NEXA [Member] | Measurement Input, Risk Free Interest Rate [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input									5.00	5.00	5.00				5.00	5.00
NEXA [Member] | Measurement Input, Price Volatility [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input									25.00	25.00	25.00				25.00	25.00