Common Stock and Paid-in Capital in Excess of Par (Details) (USD $)	6 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012 Preferred Stock	Dec. 31, 2011 Preferred Stock	Jun. 30, 2012 Common Stock	Jun. 30, 2012 Paid-in Capital in Excess of Par
Increase (Decrease) in Stockholders' Equity
Balance at the beginning of the period (in shares)		1	1	3,103,004
Balance at the beginning of the period	$ 4,714,665			$ 31,030	$ 42,295,306
Sale of common stock (in shares)				1,064,816
Sale of common stock				10,648	1,044,705
Stock-based compensation					19,527
Balance at the end of the period (in shares)		1	1	4,167,820
Balance at the end of the period	3,886,015			41,678	43,359,538
Sale of common stock, offering costs	$ 94,648