Other Intangible Assets - Other Intangible Assets (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Finite Lived Intangible Assets [Line Items]
Cost	$ 8,901,000	$ 8,901,000
Amortization Expense	435,000	435,000
Accumulated Amortization	6,797,000	6,361,000
Cost, Net of Accumulated Amortization	$ 2,104,000	$ 2,540,000
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	421,000	421,000
Accumulated Amortization	5,836,000	5,414,000
Cost, Net of Accumulated Amortization	$ 2,086,000	$ 2,508,000
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	14,000	14,000
Accumulated Amortization	186,000	172,000
Cost, Net of Accumulated Amortization	$ 18,000	$ 32,000