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Note 9 - Business Acquisitions (Details Textual) $ / shares in Units, $ in Thousands								3 Months Ended				6 Months Ended		12 Months Ended
	Dec. 10, 2024 USD ($)	Apr. 15, 2024 USD ($) shares	Mar. 31, 2024 USD ($)	Dec. 23, 2023 USD ($)	Aug. 08, 2023 USD ($)	Jul. 12, 2023 USD ($)	Mar. 27, 2023 USD ($) shares	Mar. 29, 2025 USD ($)	Sep. 28, 2024 USD ($)	Mar. 30, 2024 USD ($)	Dec. 23, 2023 USD ($)	Mar. 29, 2025 USD ($)	Sep. 23, 2023 USD ($) $ / shares	Mar. 29, 2025 USD ($)	Mar. 30, 2024 USD ($)	Mar. 25, 2023 USD ($)	Dec. 28, 2024 USD ($)	Sep. 23, 2022 USD ($)	Aug. 31, 2021 USD ($)
Share-Based Payment Arrangement, Expense														$ 3,200	$ 4,500	$ 3,400
Revenues														278,421	259,481	230,569
Payment for Contingent Consideration Liability, Financing Activities														0
Other Expense [Member]
Payments for Other Holdbacks														2,700	800	0
General and Administrative Expense [Member]
Business Combination, Acquisition-Related Cost, Expense														1,300	1,200	$ 200
Current Liabilities [Member]
Unpaid Amounts for Other Holdbacks								$ 2,800				$ 2,800		2,800
Other Liabilities [Member]
Business Combination, Contingent Consideration, Liability, Current								1,600				1,600		1,600
SteriQual, Inc. [Member]
Business Combination, Acquiree's Revenue since Acquisition Date, Actual														2,200
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual														(200)
Martin [Member]
Business Combination, Consideration Transferred	$ 81,800
Payments to Acquire Businesses, Gross	71,900
Business Combination, Consideration Transferred, Equity Interest	9,900
Business Combination, Payment Withheld for Potential Post-closing Adjustments	$ 2,000
Business Combination, Contingent Consideration, Liability								2,200				2,200		$ 2,200
Business Combination, Acquiree's Revenue since Acquisition Date, Actual												8,800
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual												500
Martin [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)	30 years
Becnel Rental Tools, LLC [Member]
Business Combination, Consideration Transferred		$ 49,800
Payments to Acquire Businesses, Gross		17,500
Business Combination, Consideration Transferred, Equity Interest		32,300
Business Combination, Payment Withheld for Potential Post-closing Adjustments		2,500
Business Combination, Contingent Consideration, Liability		1,500															$ 1,600
Business Combination, Acquiree's Revenue since Acquisition Date, Actual												9,000
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual												$ 1,000
Business Combination, Consideration Held Back		500
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 2,000
Business Combination, Contingent Consideration, Liability, Payable in Cash, Percentage		50.00%
Business Combination, Contingent Consideration, Liability, Payable in Shares, Percentage		50.00%
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low		$ 0
Share-Based Payment Arrangement, Expense								$ 800
Becnel Rental Tools, LLC [Member] | Revenue Target Achievement [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares		9,283
Becnel Rental Tools, LLC [Member] | Measurement Input, Discount Rate [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input		0.11						14.5				14.5		14.5
Becnel Rental Tools, LLC [Member] | Measurement Input, Risk Free Interest Rate [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input		0.05						4.01				4.01		4.01
Becnel Rental Tools, LLC [Member] | Measurement Input, Price Volatility [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input		0.30						30				30		30
Becnel Rental Tools, LLC [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)		11 years
Axiom [Member]
Business Combination, Consideration Transferred					$ 38,700
Payments to Acquire Businesses, Gross					10,000
Business Combination, Consideration Transferred, Equity Interest					28,600
Business Combination, Payment Withheld for Potential Post-closing Adjustments					$ 3,900
Business Combination, Acquiree's Revenue since Acquisition Date, Actual														$ 8,600
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual														200
Payments for Other Holdbacks														2,300
Business Combination, Contingent Consideration, Liability, Current								$ 1,600				$ 1,600		1,600
SteriQual, Inc. [Member]
Business Combination, Consideration Transferred				$ 3,800		$ 4,300
Business Combination, Consideration Held Back						900
Payments for Other Holdbacks									$ 400
Business Combination, Consideration Subject to Reduction						$ 500
TIC-MS, Inc. [Member]
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)							15 years
Business Combination, Consideration Transferred							$ 9,700
Payments to Acquire Businesses, Gross							2,900
Business Combination, Consideration Transferred, Equity Interest							$ 6,900
Business Combination, Acquiree's Revenue since Acquisition Date, Actual														1,500
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares							77,387
Business Combination, Consideration Subject to Reduction							$ 500
Escrow Deposit							500
Business Combination, Potential Purchase Price Adjustment for Failure to Retain Key Customer Relationships							$ 500
Revenues														3,200
NEXA [Member]
Business Combination, Consideration Transferred			$ 500
Business Combination, Contingent Consideration, Liability				$ 2,900						$ 500	$ 2,900		$ 2,800		$ 500
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High								$ 7,100				$ 7,100	7,100	$ 7,100				$ 400	$ 7,500
Share-Based Payment Arrangement, Expense										$ 2,400	$ 100		$ 2,800
Business Combination, Contingent Consideration, Maximum Price Per Share for Cash Earn Out Payment (in dollars per share) | $ / shares													$ 45.07
NEXA [Member] | Measurement Input, Risk Free Interest Rate [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input										0.047			0.05		0.047
NEXA [Member] | Measurement Input, Price Volatility [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input										0.225			0.25		0.225
NEXA [Member] | Measurement Input, Cost to Sell [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input										0.12			0.09		0.12

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