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Note 4 - Revenue Recognition (Tables)

3 Months Ended

Apr. 30, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended April 30,
		2024								2023
		Sales				% of Total				Sales				% of Total
Products		$	3,253				9	%		$	2,842				9	%
Specialty Piping Systems and Coating
Revenue recognized under input method			10,140				30	%			10,338				35	%
Revenue recognized under output method			20,928				61	%			16,477				56	%
Total		$	34,321				100	%		$	29,657				100	%

Schedule of Assumptions for Long-Duration Contracts by Product and Guarantee [Table Text Block]

		April 30, 2024				January 31, 2024
Costs incurred on uncompleted contracts		$	15,980			$	21,912
Estimated earnings			10,441				11,270
Earned revenue			26,421				33,182
Less billings to date			25,010				30,580
Costs in excess of billings, net		$	1,411			$	2,602
Balance sheet classification
Contract assets: Costs and estimated earnings in excess of billings on uncompleted contracts		$	2,302			$	3,097
Contract liabilities: Billings in excess of costs and estimated earnings on uncompleted contracts			(891	)			(495	)
Costs in excess of billings, net		$	1,411			$	2,602

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