Summary of Activity of Level 3 Inputs Measured on Recurring Basis (Detail) - Fair Value, Inputs, Level 3 - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of period	$ 1,988,889	$ 2,800,572	$ 2,811,111	$ 2,586,854
Loss (gain) on change in fair value of warrant and conversion feature liability	(511,111)	(96,852)	(1,333,333)	116,866
Warrant out of period correction, as adjusted		(999,724)		(999,724)
Balance, as adjusted, end of period	1,477,778	1,703,996	1,477,778	1,703,996
Warrant Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of period	1,988,889	2,308,620	2,811,111	2,144,496
Loss (gain) on change in fair value of warrant and conversion feature liability	(511,111)	6,950	(1,333,333)	171,074
Warrant out of period correction, as adjusted		(999,724)		(999,724)
Balance, as adjusted, end of period	1,477,778	1,315,846	1,477,778	1,315,846
Conversion Feature Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of period	0	491,952	0	442,358
Loss (gain) on change in fair value of warrant and conversion feature liability	0	(103,802)	0	(54,208)
Warrant out of period correction, as adjusted		0		0
Balance, as adjusted, end of period	$ 0	$ 388,150	$ 0	$ 388,150