Summary of Activity of Level 3 Inputs Measured on Recurring Basis (Detail) - Fair Value, Inputs, Level 3	3 Months Ended
	Jun. 30, 2015 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at March 31, 2015	$ 2,586,854
Loss on change in fair value of warrant and conversion feature liability	213,718
Balance at June 30, 2015	2,800,572
Warrant Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at March 31, 2015	2,144,496
Loss on change in fair value of warrant and conversion feature liability	164,124
Balance at June 30, 2015	2,308,620
Conversion Feature Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at March 31, 2015	442,358
Loss on change in fair value of warrant and conversion feature liability	49,594
Balance at June 30, 2015	$ 491,952