Fair Value of Assets and Liabilities (Details Textual) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Fair value of assets and liabilities (Textual) [Abstract]
Expected warrant exercise price	$ 1.63	$ 1.46
Fair Value of Assets and Liabilities (Additional Textual) [Abstract]
Percentage of Ownership Limitation	19.99%	19.99%
Decrease in fair value	$ 1,321,000
Warrant [Member]
Fair value of assets and liabilities (Textual) [Abstract]
Fair value of warrants	$ 2,499,000	$ 1,178,000
Minimum [Member]
Fair value of assets and liabilities (Textual) [Abstract]
Expected warrant exercise price		$ 1.46
Maximum [Member]
Fair value of assets and liabilities (Textual) [Abstract]
Exercise price of the Warrants	1.63