Earnings per Share (Details 1)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Common Stock issuable upon the exercise of certain stock options
Common stock that have been excluded from the diluted shares calculation	2,721,085	6,991,433	2,721,085	6,991,433
Stock options outstanding under the 2006 and 2011 Stock Option Plans [Member]
Common Stock issuable upon the exercise of certain stock options
Common stock that have been excluded from the diluted shares calculation	84,000	2,060,272	84,000	2,060,272
Series C Convertible Preferred Stock [Member]
Common Stock issuable upon the exercise of certain stock options
Common stock that have been excluded from the diluted shares calculation	2,637,085	4,931,161	2,637,085	4,931,161