Note 4 - Revenue Recognition (Tables)

12 Months Ended

Jan. 31, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

	2023					2022
	Sales		% to Total			Sales		% to Total
Products	$	10,368		7	%	$	14,626		10	%
Specialty Piping Systems and Coating
Revenue recognized under input method		51,977		34	%		44,648		31	%
Revenue recognized under output method		88,323		59	%		83,295		59	%
Total	$	150,668		100	%	$	142,569		100	%

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

	2023			2022
Costs incurred on uncompleted contracts	$	21,912		$	18,342
Estimated earnings		11,270			9,370
Earned revenue		33,182			27,712
Less billings to date		30,580			26,329
Costs in excess of billings, net	$	2,602		$	1,383
Balance sheet classification
Contract assets: Costs and estimated earnings in excess of billings on uncompleted contracts	$	3,097		$	3,126
Contract liabilities: Billings in excess of costs and estimated earnings on uncompleted contracts		(495	)		(1,743	)
Costs in excess of billings, net	$	2,602		$	1,383