Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule Of Income Taxes [Line Items]
Corporate tax rate	21.00%	21.00%
Income (loss) of foreign subsidiaries before taxes	$ 99,000	$ 123,000
Deferred tax valuation allowance against assets	4,360,000	3,516,000
U.S. federal
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	$ 14,400,000
U.S. federal | Earliest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2017
U.S. federal | Latest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2020
States
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	$ 17,600,000
States | Earliest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2012
States | Latest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2020
ASU 2019-12
Schedule Of Income Taxes [Line Items]
Provision for income tax expense	$ 11,000	$ 15,000