Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Schedule Of Income Taxes [Line Items]
Corporate tax rate	21.00%	21.00%
Income (loss) of foreign subsidiaries before taxes	$ 425,000	$ (419,000)
Deferred tax valuation allowance against assets	2,901,000	$ 1,365,000
U.S. federal
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	$ 7,600,000
U.S. federal | Earliest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2016
U.S. federal | Latest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2019
States
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	$ 15,500,000
States | Earliest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2011
States | Latest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2019