Options Outstanding (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable, Number of Shares Issuable	4,081,196
Not vested, Number of Shares Issuable	3,410,000
Balance, Number of Shares Issuable	7,491,196
Exercisable, Weighted-Average Exercise Price	$ 0.98
Not vested, Weighted-Average Exercise Price	$ 1.03
Balance, Weighted-Average Exercise Price	$ 1.00
Exercisable, Weighted-Average Remaining Term (Years)	3 years 10 months 24 days
Not vested, Weighted-Average Remaining Term (Years)	6 years 4 months 24 days
Balance, Weighted-Average Remaining Term (Years)	5 years
Exercisable, Aggregate Intrinsic Value	$ 191,000
Not vested, Aggregate Intrinsic Value	452,400
Balance, Aggregate Intrinsic Value	$ 643,400