Options Outstanding (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable, Number of Shares Issuable	3,348,049
Not vested, Number of Shares Issuable	1,400,000
Balance, Number of Shares Issuable	4,748,049
Exercisable, Weighted-Average Exercise Price	$ 1.11
Not vested, Weighted-Average Exercise Price	$ 1.77
Balance, Weighted-Average Exercise Price	$ 1.30
Exercisable, Weighted-Average Remaining Term (Years)	2 years 4 months 24 days
Not vested, Weighted-Average Remaining Term (Years)	3 years 9 months 18 days
Balance, Weighted-Average Remaining Term (Years)	2 years 9 months 18 days
Exercisable, Aggregate Intrinsic Value	$ 6,000
Not vested, Aggregate Intrinsic Value	0
Balance, Aggregate Intrinsic Value	$ 6,000