Subsequent Events	9 Months Ended
Feb. 28, 2021
Subsequent Events [Abstract]
Subsequent Events	NOTE S – Subsequent Events On March 12, 2021, the Company sold its Structural Composites Industries, LLC (“SCI”) facility located in Pomona, California to Luxfer Holdings PLC for total proceeds of approximately $20,000,000, subject to a closing working capital adjustment. The divestiture includes the SCI entity and the related operating assets. As a result of the sale, the Company will record a loss in the fourth quarter of fiscal 2021 of approximately $7,000,000, related almost entirely to the allocation of goodwill. Other than the location being available for sale in its immediate condition, the held for sale criteria had not been met as of February 28, 2021. On March 18, 2021, we entered into a seven-year operating lease for an aircraft in which we guaranteed a residual value at the termination of the lease. The maximum obligation under the terms of the guarantee is approximately $19,800,000.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

Name:	us-gaap_SubsequentEventsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration