Revenue Recognition (Tables)

6 Months Ended

Nov. 30, 2020

Disaggregation Of Revenue [Line Items]

Revenue by Product Class and Over Time

The following table summarizes net sales by product class for the periods presented:

	Three Months Ended				Six Months Ended
(in thousands)	November 30,				November 30,
Reportable segments by product class:	2020		2019		2020		2019
Steel Processing
Direct	$	433,556	$	481,058	$	838,364	$	974,704
Toll		35,167		35,879		61,379		65,608
Total		468,723		516,937		899,743		1,040,312
Pressure Cylinders
Consumer products		121,618		128,065		254,400		247,545
Industrial products		134,020		130,334		262,245		282,952
Oil & gas equipment		6,646		31,737		16,543		64,035
Total		262,284		290,136		533,188		594,532
Other
Engineered Cabs		85		20,550		1,070		48,616
Other		-		14		-		36
Total		85		20,564		1,070		48,652
Total	$	731,092	$	827,637	$	1,434,001	$	1,683,496

Summary of Unbilled Receivable and Contract Assets

The following table summarizes the unbilled receivables and contract assets for the periods indicated:

		November 30,		May 31,
(in thousands)	Balance Sheet Classification	2020		2020
Unbilled receivables	Receivables	$	4,937	$	5,552
Contract assets	Prepaid and other current assets	$	5,636	$	4,127

Over time revenue

Disaggregation Of Revenue [Line Items]

Revenue by Product Class and Over Time

The following table summarizes the over time revenue for the periods presented:

	Three Months Ended				Six Months Ended
	November 30,				November 30,
(in thousands)	2020		2019		2020		2019
Steel Processing - toll	$	35,167	$	35,879	$	61,379	$	65,608
Pressure Cylinders - certain oil & gas equipment contracts		4,367		27,531		12,066		57,539
Total over time revenue	$	39,534	$	63,410	$	73,445	$	123,147