Summary of the Status of the Company's Stock Option Plan (Detail) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Shares
Outstanding at Beginning of Period	3,435,443	3,411,943	3,411,943
Cancelled	(8,313)		(49,000)
Exercised	(109,038)		(2,500)
Granted	30,843	75,000	75,000
Outstanding at end of period	3,348,935		3,435,443
Weighted Average Exercise Price
Outstanding at beginning of period	$ 1.22	$ 1.23	$ 1.23
Cancelled	$ 1.10		$ 2.04
Exercised	$ 1.42		$ 1.12
Granted	$ 3.27		$ 1.31
Outstanding at end of period	$ 1.23		$ 1.22