Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Segment	Sep. 30, 2011	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Number of operating segments			2
Cash flow from operation	$ 600,000		$ (764,270)	$ 564,255
Overall cash flow for the period	100,000		(2,216,816)	(383,130)
Common stock equivalents, anti-dilutive	7,002,200	4,746,717	6,896,405	6,144,661
Common stock equivalents		6,975,633
Common stock equivalents, dilutive		2,228,916
Expected dividend yield of stock options			0.00%
Outstanding stock options	5,297,511		5,297,511		4,641,039
Outstanding stock options, weighted average remaining contractual term			6 years 7 months 6 days
Exercisable stock options	3,575,182		3,575,182		3,206,994
Exercisable stock options, weighted average remaining contractual term			5 years 6 months
Share-based compensation	483,000	462,000	1,411,672	1,737,220
Share-based compensation expense expected to recognize	$ 2,300,000		$ 2,300,000
Share-based compensation expense expected to recognize, period for recognition			5 years