Warrants (Detail) - Warrant activity (USD $)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Outstanding at December 31, 2011	929,914
Outstanding at December 31, 2011	15.13
Outstanding at December 31, 2011	$2.80 - $169.47
Warrants issued	5,000
Warrants issued (in Dollars per share)	$ 3.80
Warrants issued (in Dollars per share)	$ 3.80
Outstanding at June 30, 2012	934,914
Outstanding at June 30, 2012	15.07
Outstanding at June 30, 2012	$2.80 - $169.47
Warrants exercisable at June 30, 2012	904,914
Warrants exercisable at June 30, 2012 (in Dollars per share)	$ 15.26
Warrants exercisable at June 30, 2012 (in Dollars per share)	$ 8.02	$ 18.57