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Other Intangible Assets - Other Intangible Assets (Detail) - USD ($)
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Finite Lived Intangible Assets [Line Items]    
Cost $ 8,901,000 $ 8,901,000
Amortization Expense 383,000 423,000
Accumulated Amortization 8,463,000 8,080,000
Cost, Net of Accumulated Amortization $ 438,000 $ 821,000
Covenant Not to Compete [Member]    
Finite Lived Intangible Assets [Line Items]    
Life 5 years 5 years
Cost $ 775,000 $ 775,000
Amortization Expense 0 0
Accumulated Amortization 775,000 775,000
Cost, Net of Accumulated Amortization 0 0
Customer Relationships [Member]    
Finite Lived Intangible Assets [Line Items]    
Cost 7,922,000 7,922,000
Amortization Expense 383,000 421,000
Accumulated Amortization 7,484,000 7,101,000
Cost, Net of Accumulated Amortization $ 438,000 $ 821,000
Customer Relationships [Member] | Maximum [Member]    
Finite Lived Intangible Assets [Line Items]    
Life 20 years 20 years
Customer Relationships [Member] | Minimum [Member]    
Finite Lived Intangible Assets [Line Items]    
Life 18 years 18 years
Third Party Administrator Licenses [Member]    
Finite Lived Intangible Assets [Line Items]    
Life 15 years 15 years
Cost $ 204,000 $ 204,000
Amortization Expense 0 2,000
Accumulated Amortization 204,000 204,000
Cost, Net of Accumulated Amortization $ 0 $ 0