Effective Rate Reflected in Provision for Income Taxes and Amounts Determined by Applying Statutory Federal Rate (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Statutory provision	$ (553,000)	$ (1,044,000)
Foreign subsidiary	(36,000)	(80,000)
State taxes	(219,000)	91,000
Permanent differences	39,000	1,000
Effect of new rate per Tax Act on deferred tax asset	(342,000)	325,000
Adjustment to prior year taxes	(449,000)	(106,000)
Federal taxes on Section 965		3,121,000
Valuation allowance	917,000	160,000
Utilization of NOL on Section 965		997,000
NOL Adjustments	(51,000)	(4,000)
(Benefit) provision for income tax expense	$ (352,000)	$ 3,461,000