Property and Equipment - Additional Information (Detail) (USD $)	12 Months Ended		131 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	$ 335,597	$ 303,677	$ 1,985,755
Minimum
Property, Plant, and Equipment Disclosure [Line Items]
Property, plant and equipment, useful life	3 years
Maximum
Property, Plant, and Equipment Disclosure [Line Items]
Property, plant and equipment, useful life	10 years