3. Stock Options (Detail) - Schedule of option activity (USD $)	9 Months Ended		9 Months Ended		9 Months Ended	12 Months Ended	9 Months Ended
	Sep. 30, 2012 Number of shares [Member]	Dec. 31, 2010 Number of shares [Member]	Sep. 30, 2012 Weighted average exercise price [Member]	Dec. 31, 2010 Weighted average exercise price [Member]	Sep. 30, 2012 Weighted average remaining contractual term [Member]	Dec. 31, 2011 Weighted average remaining contractual term [Member]	Sep. 30, 2012 Aggregate intrinsic value [Member]	Dec. 31, 2010 Aggregate intrinsic value [Member]
Number of shares		492,978
Weigthed average exercise price (in Dollars per share)				$ 2.61
Weighted average remaining contractual term					2 years 346 days	2 years 339 days
Aggregate intrinsic value (in Dollars)								$ 1,925,176
Exercisable at end of period	294,978
Exercisable at end of period (in Dollars per share)			$ 3.29
Exercisable at end of period					2 years 222 days
Exercisable at end of period (in Dollars)							790,799
Nonvested at end of period	21,000
Nonvested at end of period (in Dollars per share)			$ 6.47
Nonvested at end of period					7 years 233 days
Granted	0
Granted (in Dollars per share)			$ 0
Exercised	(175,000)
Exercised (in Dollars per share)			$ 1.00
Exercised (in Dollars)							753,531
Forfeited or expired	(2,000)
Forfeited or expired (in Dollars per share)			$ 4.45
Number of shares	315,978	492,978
Weigthed average exercise price (in Dollars per share)			$ 3.50	$ 2.61
Weighted average remaining contractual term					2 years 346 days	2 years 339 days
Aggregate intrinsic value (in Dollars)							$ 790,799	$ 1,925,176