Annual report pursuant to Section 13 and 15(d)

Changes in Accumulated Other Comprehensive Loss - Reclassifications Out of Accumulated Other Comprehensive Loss by Component (Detail)

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Changes in Accumulated Other Comprehensive Loss - Reclassifications Out of Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income before provision for income taxes $ 5,574 $ 561 $ (11,216)
Provision (benefit) for income taxes 1,018 194 (2,443)
Net (loss) income 4,556 367 $ (8,773)
Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Amortization of Actuarial Loss [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income before provision for income taxes [1] (843) (672)  
Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Pension and Other Postretirement Benefits Items [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income before provision for income taxes (843) (672)  
Provision (benefit) for income taxes (184) (149)  
Net (loss) income $ (659) $ (523)  
[1] These accumulated other comprehensive loss components are included within the computation of net periodic pension and other postretirement benefit costs. See Note 12.