Warrant Activity Under Plan (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share Based Compensation Plans [Line Items]
Exercised	(525,000)
Warrant [Member]
Share Based Compensation Plans [Line Items]
Outstanding	10,000	85,620	85,620
Granted	0	0	0
Exercised	0	0	0
Forfeited/expired	0	(75,620)	0
Outstanding	10,000	10,000	85,620	85,620
Vested and expected to vest	10,000	10,000	85,620
Exercisable	10,000	10,000	0
Weighted - Average Exercise Price, Outstanding	$ 0.90	$ 0.90	$ 0.90
Weighted - Average Exercise Price, Granted	$ 0	$ 0
Weighted - Average Exercise Price, Exercised	$ 0	$ 0
Weighted - Average Exercise Price, Forfeited/expired	$ 0	$ 0.90
Weighted - Average Exercise Price, Outstanding	$ 0.90	$ 0.90	$ 0.90	$ 0.90
Weighted - Average Exercise Price, Vested and expected to vest	$ 0.90	$ 0.90	$ 0.90
Weighted - Average Exercise Price, Exercisable	$ 0.90	$ 0.90	$ 0
Weighted Average Remaining Contractual Term (In years), Outstanding	3 years 3 months 18 days	4 years 3 months 18 days	10 months 24 days	1 year 10 months 24 days
Weighted Average Remaining Contractual Term (In years), Vested and expected to vest	3 years 3 months 18 days	4 years 3 months 18 days	10 months 24 days
Weighted Average Remaining Contractual Term (In years), Exercisable	3 years 3 months 18 days	4 years 3 months 18 days	0 years
Aggregate Intrinsic Value, Outstanding	$ 31,000	$ 0	$ 0
Aggregate Intrinsic Value, Outstanding	17,600	31,000	0	0
Aggregate Intrinsic Value, Vested and expected to vest	17,600	31,000	0
Aggregate Intrinsic Value, Exercisable	$ 17,600	$ 31,000	$ 0