Options Outstanding (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable, Number of Shares Issuable	3,768,128
Not vested, Number of Shares Issuable	3,410,000
Balance, Number of Shares Issuable	7,178,128	7,502,421
Exercisable, Weighted-Average Exercise Price	$ 0.97
Not vested, Weighted-Average Exercise Price	$ 1.03
Balance, Weighted-Average Exercise Price	$ 1.00	$ 1.00
Exercisable, Weighted-Average Remaining Term (Years)	3 years 8 months 12 days
Not vested, Weighted-Average Remaining Term (Years)	6 years 1 month 6 days
Balance, Weighted-Average Remaining Term (Years)	4 years 9 months 18 days
Exercisable, Aggregate Intrinsic Value	$ 100,000
Not vested, Aggregate Intrinsic Value	258,000
Balance, Aggregate Intrinsic Value	$ 358,000