Income tax provision (benefit) (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Current:
Federal	$ (81,614)	$ (9,979)
State	(6,069)	66,678
Current Income Tax Expense (Benefit)	(87,683)	56,699
Deferred:
Federal	25,598	(81,277)
State	14,590	(46,459)
Deferred Income Tax Expense (Benefit)	40,188	(127,736)
(Benefit) provision for income taxes	$ (47,495)	$ (71,037)