Financial Instruments, Measured at Fair Value, by Level within Fair Value Hierarchy (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Fair Value Assets and Liabilities Measured On Recurring and Nonrecurring Basis [Line Items]
Warrant liability	$ 33,262	$ 354,000
Fair Value, Inputs, Level 1
Fair Value Assets and Liabilities Measured On Recurring and Nonrecurring Basis [Line Items]
Warrant liability	0	0
Fair Value, Inputs, Level 2
Fair Value Assets and Liabilities Measured On Recurring and Nonrecurring Basis [Line Items]
Warrant liability	33,262	354,000
Fair Value, Inputs, Level 3
Fair Value Assets and Liabilities Measured On Recurring and Nonrecurring Basis [Line Items]
Warrant liability	$ 0	$ 0