Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Calculation of basic and diluted weighted average shares outstanding and earnings per share of common stock
Net income (loss)	$ (1,852)	$ (3,568)	$ (6,667)	$ (7,265)
Preferred stock dividends	930	930	2,792	2,792
Net loss attributable to common stock	$ (2,782)	$ (4,498)	$ (9,459)	$ (10,057)
Weighted average shares outstanding:
Basic	11,341,277	11,255,229	11,324,653	11,240,945
Dilution effect of stock options outstanding at the end of period
Weighted average shares—diluted	11,341,277	11,255,229	11,324,653	11,240,945
Net loss per common share:
Basic	$ (0.25)	$ (0.40)	$ (0.84)	$ (0.89)
Diluted	$ (0.25)	$ (0.40)	$ (0.84)	$ (0.89)