Summary of Warrant Activity (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Shares underlying warrants
Shares Underlying Warrants Outstanding	1,002,778
Warrant [Member]
Shares underlying warrants
Shares Underlying Warrants Outstanding	800,000	200,000
Shares Underlying Warrants, Warrants issued with long-term debentures		200,000
Warrants issued as consultant compensation		400,000
Warrants issued with long-term notes payable	402,778
Warrants expired (Series A)	(200,000)
Shares Underlying Warrants Outstanding	1,002,778	800,000
Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price Outstanding	$ 1.88	$ 2.75
Weighted average exercise price warrant issued with long term debentures		$ 2.75
Weighted average exercise price warrants issues as consultant compensation		$ 1.00
Weighted average exercise price warrants issued with long- term notes payable	$ 1.63
Weighted average exercise price warrants expired (series A)	$ 0
Weighted Average Exercise Price Outstanding	$ 1.85	$ 1.88
Weighted Average Remaining Contractual Term [Abstract]
Weighted average remaining contractual term (in years) Outstanding	2 years 3 months 18 days	2 years 6 months
Weighted average remaining contractual term (in years) warrants issued with long-term debentures		1 year 6 months
Weighted average remaining contractual term (in years) warrants issued as consultant compensation		3 years 1 month 6 days
Weighted average remaining contractual term (in years) warrants issued with long- term notes payable	2 years 6 months
Weighted average remaining contractual term (in years) warrants expired (Series A)	0 years
Weighted average remaining contractual term (in years) Outstanding	2 years	2 years 3 months 18 days
Aggregate intrinsic value
Aggregate Intrinsic value (In the money)	$ 400,000	$ 0
Aggregate Intrinsic value(In the money) warrant issued with long term debentures		0
Aggregate Intrinsic value (In the money) warrants issued as consultant compensation		400,000
Aggregate Intrinsic value (In the money) warrants issued with long-term notes payable	0
Aggregate Intrinsic value (In the money warrants expired (Series A)	0
Aggregate Intrinsic value (In the money)	$ 0	$ 400,000