Offerings of Common Stock (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended					12 Months Ended		0 Months Ended	1 Months Ended		0 Months Ended
	May 06, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 March 2010 Private Placement [Member]	Dec. 31, 2011 March 2010 Private Placement [Member]	Dec. 31, 2012 February 2012 Private Placement [Member]	Dec. 31, 2012 September 2012 Private Placement [Member]	Sep. 30, 2012 September 2012 Private Placement [Member]	Feb. 02, 2012 Private Placement [Member]	Sep. 30, 2012 Private Placement [Member]	Jan. 18, 2012 Lansdowne Partners Limited Partnership, Greenway Capital Partners and Paragon Associates [Member]	Mar. 05, 2010 Lansdowne Partners Limited Partnership, Greenway Capital Partners and Paragon Associates [Member]
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock, shares	1,175,512								5,257,267	8,000,000		3,005,349
Common stock issued, price per share	$ 1.99								$ 1.5	$ 1.1		$ 1.31
Proceeds from issuance of common stock, net of offering costs		$ 16,452,538	$ 2,179,535							$ 8,800,000
Net proceeds from issuance of shares in Private Placement									7,822,000			3,879,403
Registration statement filing period after closing of Private Placement									90 days	45 days		45 days
Registration statement effective period after closing of Private Placement									180 days	180 days		120 days
Number of shares included in a registration statement to be registered with the SEC												3,005,349
Common stock classified outside of stockholders' equity (deficit) (Note 11)		$ 11,775,724	$ 7,854,682	$ 3,092,396	$ 7,854,682	$ 3,183,328	$ 5,500,000		$ 7,885,900	$ 8,800,000		$ 3,879,403
Percentage of shares purchased required to be held for board observer designation right										50.00%
Shares of common stock reclassified to equity							3,000,000				3,658,676
Shares classified outside of stockholders' equity							5,000,000	8,000,000