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)	Jun. 30, 2020
ASU 2016-13 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounting standards update adopted (true false)	false
ASU 2018-14 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounting standards update adopted (true false)	false
ASU 2019-12 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounting standards update adopted (true false)	false

- Definition

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

+ References

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+ Details