Graham Corporation Annual report pursuant to Section 13 and 15(d)

Assets Dispositions - Additional Information (Detail)

v3.21.1

Assets Dispositions - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment loss	$ 184		$ 6,449
Proceeds from sale of subsidiary		$ 602
Loss on sale of Energy Steel & Supply Co.		181
Westinghouse Electric Company [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Bad debt charge		98
Inventory write down		338
Energy Steel [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of subsidiary		602
Loss on sale of Energy Steel & Supply Co.		$ 181

- Definition

Write off of trade accounts receivable.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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- Definition

Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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- Definition

The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or the sale of investment in consolidated subsidiaries (generally greater than 50 percent).

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