Warrants (Detail) - Warrant activity (USD $)	Mar. 31, 2013	Dec. 31, 2012
Outstanding	923,090	923,090
Outstanding (in Dollars per share)	$ 7.77	$ 7.77
Outstanding	$2.09 - $48.90	$2.09 - $48.90
Warrants exercisable at March 31, 2013	863,090
Warrants exercisable at March 31, 2013 (in Dollars per share)	$ 7.92
Warrants exercisable at March 31, 2013	$2.09 - $48.90