Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Revenue Disaggregated by Product Line and Geographic Area (Detail)

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Revenue Recognition - Revenue Disaggregated by Product Line and Geographic Area (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Disaggregation Of Revenue [Line Items]      
Net sales $ 185,533 $ 157,118 $ 122,814
Asia [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 15,144 16,040 13,687
Canada [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 4,229 4,464 3,583
Middle East [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 2,568 2,914 2,489
South America [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 733 3,021 1,972
U.S. [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 155,908 127,519 97,718
All Other [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 6,951 3,160 3,365
Refining [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 29,087 27,270 24,406
Chemical/Petrochemical [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 20,893 21,950 15,955
Defense [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 99,493 65,327 62,189
Space [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales 13,282 21,180 5,744
Other Commercial [Member]      
Disaggregation Of Revenue [Line Items]      
Net sales $ 22,778 $ 21,391 $ 14,520