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

Revenue Recognition - Additional Information (Detail1)	Dec. 31, 2023
Minimum [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Contract With Customer Assets And Liabilities [Line Items]
Revenue remaining performance obligation percentage	25.00%
Revenue remaining performance obligation, expected timing of satisfaction, period	1 year
Maximum [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Contract With Customer Assets And Liabilities [Line Items]
Revenue remaining performance obligation percentage	40.00%
Revenue remaining performance obligation, expected timing of satisfaction, period	1 year
Maximum [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Contract With Customer Assets And Liabilities [Line Items]
Revenue remaining performance obligation percentage	30.00%
Revenue remaining performance obligation, expected timing of satisfaction, period	2 years