Impairment of Long-Lived Assets	3 Months Ended
Aug. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment of Long-Lived Assets	NOTE E – Impairment of Long-Lived Assets Fiscal 2021: During the first quarter of fiscal 2021, management determined indicators of impairment were present with regard to the cryogenics business primarily operated out of Theodore, Alabama with European distribution in Austria. As a result, property, plant and equipment with a carrying value of $13,526,000 were written down to their estimated fair value of $9,193,000 (determined using Level 2 inputs), resulting in an impairment charge of $4,333,000. Additionally, the customer list intangible assets with a carrying value of $3,662,000 were deemed to be fully impaired and written off. The fair value of the customer list intangible assets was determined using unobservable Level 3 inputs. During the first quarter of fiscal 2021, the Company decided to discontinue its operation of the manufacturing line for alternative fuel cylinders at the Jefferson, Ohio facility. As a result, long-lived assets with a carrying value of $1,823,000 were written down to their estimated fair market value of $400,000 (determined using Level 2 inputs), resulting in an impairment charge of $1,423,000. During the first quarter of fiscal 2021, the Company recognized a $506,000 impairment charge related to the Superior Tools business that was acquired as part of Magna Industries, Inc. in fiscal 2019 and subsequently sold. Fiscal 2020: During the first quarter of fiscal 2020, the Company committed to plans to sell substantially all of the net assets of its Engineered Cabs business with the exception of the fabricated products facility in Stow, Ohio, and the steel packaging facility in Greensburg, Indiana. As the disposal group met the criteria for classification as assets held for sale as of August 31, 2019, those net assets were presented separately as assets held for sale in our consolidated balance sheet as of August 31, 2019. In accordance with the applicable accounting guidance, such net assets were recorded at the lower of net book value or fair value less costs to sell. The book value of the disposal group exceeded its estimated fair market value of $12,860,000 (determined using Level 2 inputs), resulting in an impairment charge of $35,194,000 during the three months ended August 31, 2019. Included in the impairment charge were lease ROU assets with a net book value of $905,000 that were deemed fully impaired and written off. The Company also identified an impairment indicator for the long-lived assets of the fabricated products business as the planned sale would have an adverse impact on the manner and extent in which these assets were used. As a result, fixed assets with a net book value of $1,469,000 and lease ROU assets with a net book value of $3,938,000 were deemed to be fully impaired and written off during the first quarter of fiscal 2020.

Impairment of Long-Lived Assets

3 Months Ended

Aug. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

NOTE E – Impairment of Long-Lived Assets

Fiscal 2021: During the first quarter of fiscal 2021, management determined indicators of impairment were present with regard to the cryogenics business primarily operated out of Theodore, Alabama with European distribution in Austria. As a result, property, plant and equipment with a carrying value of $13,526,000 were written down to their estimated fair value of $9,193,000 (determined using Level 2 inputs), resulting in an impairment charge of $4,333,000. Additionally, the customer list intangible assets with a carrying value of $3,662,000 were deemed to be fully impaired and written off. The fair value of the customer list intangible assets was determined using unobservable Level 3 inputs.

During the first quarter of fiscal 2021, the Company decided to discontinue its operation of the manufacturing line for alternative fuel cylinders at the Jefferson, Ohio facility. As a result, long-lived assets with a carrying value of $1,823,000 were written down to their estimated fair market value of $400,000 (determined using Level 2 inputs), resulting in an impairment charge of $1,423,000.

During the first quarter of fiscal 2021, the Company recognized a $506,000 impairment charge related to the Superior Tools business that was acquired as part of Magna Industries, Inc. in fiscal 2019 and subsequently sold.

Fiscal 2020: During the first quarter of fiscal 2020, the Company committed to plans to sell substantially all of the net assets of its Engineered Cabs business with the exception of the fabricated products facility in Stow, Ohio, and the steel packaging facility in Greensburg, Indiana. As the disposal group met the criteria for classification as assets held for sale as of August 31, 2019, those net assets were presented separately as assets held for sale in our consolidated balance sheet as of August 31, 2019. In accordance with the applicable accounting guidance, such net assets were recorded at the lower of net book value or fair value less costs to sell. The book value of the disposal group exceeded its estimated fair market value of $12,860,000 (determined using Level 2 inputs), resulting in an impairment charge of $35,194,000 during the three months ended August 31, 2019. Included in the impairment charge were lease ROU assets with a net book value of $905,000 that were deemed fully impaired and written off. The Company also identified an impairment indicator for the long-lived assets of the fabricated products business as the planned sale would have an adverse impact on the manner and extent in which these assets were used. As a result, fixed assets with a net book value of $1,469,000 and lease ROU assets with a net book value of $3,938,000 were deemed to be fully impaired and written off during the first quarter of fiscal 2020.