Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Consolidated Balance Sheets
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	2,589,143	1,009,899
Preferred stock, shares outstanding	2,589,143	1,009,899
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	2,270,528	108,983
Common stock, shares outstanding	2,270,528	101,842
Treasury stock, shares	0	7,141