Summary of Activity of Level 3 Inputs Measured on Recurring Basis (Detail) (Fair Value, Inputs, Level 3, USD $)	3 Months Ended
	Jun. 30, 2014
Fair Value, Inputs, Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 2,354,624
Transfers in (out) of Level 3	0
Change in fair value of warrant liability	30,005
Holdback liability (see Note 3)	136,822
Ending Balance	$ 2,521,451