Effective Rate Reflected in Provision for Income Taxes and Amounts Determined by Applying Statutory Federal Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Statutory provision	$ (1,044)	$ (40)
Foreign subsidiary	(80)	(71)
State taxes	91	(51)
Permanent differences	1	112
Effect of new rate per Tax Act on deferred tax asset	325
True up to prior year taxes	(106)	(63)
Federal taxes on Section 965	3,121
Valuation allowance	160	288
Utilization of NOL on Section 965	997
NOL Adjustments	(4)	(3)
Provision for income tax expense	$ 3,461	$ 172