Series C Convertible Preferred Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Series C Convertible Preferred Stock installments
Dividend, Installment Payments	$ 2,026
Dividend, Cash	996
Dividend, Stock	1,030
Dividend, Stock (shares)	80,165
Principal, Installment Payments	15,560
Principal, Cash	7,780
Principal, Stock	7,780
Principal, Stock (shares)	603,931
Total, Installment Payments	17,586
Total, Cash	8,776
Total, Stock	$ 8,810
Total, Stock (shares)	684,096