Stock-Based Compensation (Details Textual) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended		6 Months Ended				12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2012 Employees and Consultants [Member]	Jun. 30, 2011 Employees and Consultants [Member]	Jun. 30, 2012 2001 Stock Plan [Member]	Oct. 31, 2006 2001 Stock Plan [Member]	Dec. 31, 2006 2001 Stock Plan [Member] Stock Options and Stock Appreciation Rights Sars [Member]	Jun. 30, 2012 2007 Stock Plan [Member]	Mar. 20, 2007 2007 Stock Plan [Member]	Jun. 30, 2012 2010 Stock Plan [Member]	Nov. 02, 2010 2010 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	3,968,746		3,968,746		2,979,010	2,539,091	0		1,066,007	1,489,353		912,739	2,500,000	1,990,000	3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross							1,550,000	332,002			250,000
Stock Granted During Period, Value, Share-based Compensation, Gross							$ 3,500,000	$ 446,000
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Weighted Average Grant Date Fair Value			$ 2.25	$ 1.34	$ 1.26
Options Exercised			334,851	10,000	23,333
Allocated Share-based Compensation Expense	400,000	57,000	908,000	427,000
Expected Unrecognised Share Based Compensation Cost	$ 3,100,000		$ 3,100,000