Fair Value of Assets and Liabilities - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)	12 Months Ended
	Dec. 31, 2014 USD ($)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Change in fair value of the derivative warrant liability	$ 28,448
Reclassification of derivative warrant liability to equity	(48,380)
Derivative warrant liability, Ending balance	0
Fair Value, Measurements, Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative warrant liability, Beginning balance	19,932
Change in fair value of the derivative warrant liability	28,448
Reclassification of derivative warrant liability to equity	(48,380)
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative warrant liability, Beginning balance	19,932
Change in fair value of the derivative warrant liability	28,448
Reclassification of derivative warrant liability to equity	$ (48,380)