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

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 77,191	$ 67,478
Less - accumulated depreciation and amortization	45,111	41,955
Property, plant and equipment, net	32,080	25,523
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	450	450
Buildings and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	24,651	23,112
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	45,391	41,398
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 6,699	$ 2,518