Graham Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Accounting and Reporting Changes - Additional Information (Detail)

Accounting and Reporting Changes - Additional Information (Detail) - ASU 2019-12 [Member]	Dec. 31, 2021
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounting standards update adopted	true
Accounting standards update, adoption date	Apr. 01, 2021
Accounting standards update, immaterial effect	true

- Definition

Indicates (true false) whether accounting standards update was adopted.

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- Definition

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