Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Stockholders' equity
Preferred stock, par value (in dollars per share)	$ 4	$ 4
Preferred stock, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	14,738	14,738
Preferred stock, shares outstanding (in shares)	14,738	14,738
Common stock, par value (in dollars per share)	$ 4	$ 4
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	5,338,295	4,251,795
Common stock, shares outstanding (in shares)	5,338,295	4,251,795