Note 4 - Revenue Recognition (Tables)

12 Months Ended

Jan. 31, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

	2021					2020
	Sales		% to Total			Sales		% to Total
Products	$	13,575		10	%	$	11,496		14	%
Specialty Piping Systems and Coating
Revenue recognized under input method		44,778		32	%		35,041		41	%
Revenue recognized under output method		80,199		58	%		38,157		45	%
Total	$	138,552		100	%	$	84,694		100	%

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

(In thousands)	2021			2020
Costs incurred on uncompleted contracts	$	20,021		$	17,543
Estimated earnings		12,030			9,651
Earned revenue		32,051			27,194
Less billings to date		31,019			23,949
Costs in excess of billings, net	$	1,032		$	3,245
Balance sheet classification
Contract assets: Costs and estimated earnings in excess of billings on uncompleted contracts	$	2,309		$	4,007
Contract liabilities: Billings in excess of costs and estimated earnings on uncompleted contracts		(1,277	)		(762	)
Costs in excess of billings, net	$	1,032		$	3,245