Convertible Debentures (Details Textual) (USD $)	1 Months Ended		3 Months Ended	9 Months Ended
	Feb. 28, 2011 D	Dec. 20, 2005	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2010
Convertible Debentures (Textual) [Abstract]
Debentures, principal amount		$ 25,000,000
Quarterly installment amount		2,800,000
Deferment Period for debenture cost				24 months
Conversion of principal into shares of common stock, Shares	514,086				514,000
Debentures, outstanding amount						8,300,000
Conversion of principal into shares of common stock, Value	8,300,000				8,333,000
Debentures converted into common stock, conversion price per share	$ 16.21
Common stock fair value on the date of conversion of debentures	9,300,000
Gain (loss) on embedded derivatives and warrants, conversion	1,000,000
Gain (loss) on embedded derivatives and warrants, fair value measurement					78,000
Number of trading days	20
Minimum cash balance required to maintain	8,000,000
Amortized discount and prepaid fees			16,000	42,000	55
Debt instrument original discount and issuance costs	$ 9,200,000