Assets And Liabilities Measured at Fair Value on Recurring Basis by Level Within Fair Value Hierarchy (Detail) (USD $)	Dec. 31, 2012		Dec. 31, 2011
Assets
Targets	$ 313,350
Fair Value, Measurements, Recurring
Assets
Money Market Account	239,504	[1]	371,671	[1]
Targets	313,350	[2]	0	[2]
Liabilities
Warrant Liability	133,334		80,357
Fair Value, Measurements, Recurring | Level 1
Assets
Money Market Account	239,504	[1]	371,671	[1]
Targets	313,350	[2]	0	[2]
Liabilities
Warrant Liability	0		0
Fair Value, Measurements, Recurring | Level 2
Assets
Money Market Account	0	[1]	0	[1]
Targets	0	[2]	0	[2]
Liabilities
Warrant Liability	0		0
Fair Value, Measurements, Recurring | Level 3
Assets
Money Market Account	0	[1]	0	[1]
Targets	0	[2]	0	[2]
Liabilities
Warrant Liability	$ 111,811		$ 80,357

[1] Included in cash and cash equivalents and restricted cash on the consolidated balance sheet

[2] Included in other current assets on the consolidated balance sheet.