Income Taxes - Additional Information (Detail) - USD ($)		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2017	Mar. 31, 2016
Schedule Of Income Taxes [Line Items]
Statutory federal rate		34.00%	34.00%
Income (loss) of foreign subsidiaries before taxes		$ (220,000)	$ (212,000)
Deferred tax valuation allowance against assets	$ 288,000	288,000
U.S. federal
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	$ 300,000	300,000
U.S. federal | Earliest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2013
U.S. federal | Latest Tax Year
Schedule Of Income Taxes [Line Items]
Open tax years	2016
States
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	$ 3,000,000	$ 3,000,000
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	2015