Stockholders' Equity (Equity Distribution Agreement) (Details) (USD $)	1 Months Ended	12 Months Ended				0 Months Ended	12 Months Ended	0 Months Ended
	Jun. 30, 2012 Maxim 2010 Agreement	Dec. 31, 2013 Maxim 2010 Agreement	Dec. 31, 2011 Maxim 2010 Agreement	Dec. 31, 2010 Maxim 2010 Agreement	Dec. 31, 2012 Maxim 2010 Agreement Shares Sold In Current Period	Jul. 23, 2012 Maxim 2012 Agreement	Dec. 31, 2013 Maxim 2012 Agreement	Oct. 05, 2012 Maxim 2012 Agreement October 5, 2012 Prospectus Supplement Increased Offering	Dec. 23, 2013 Maxim 2012 Agreement December 23, 2013 Prospectus Supplement Increased Offering	Sep. 14, 2012 Maximum Maxim 2012 Agreement September 14, 2012 Prospectus Supplement Increased Offering	Sep. 14, 2012 Minimum Maxim 2012 Agreement September 14, 2012 Prospectus Supplement Increased Offering
Equity Distribution Agreement, Description			Pursuant to a May 28, 2010 Equity Distribution Agreement (the “Old EDA”) with Maxim Group LLC (“Maxim”), the Company established an At-The-Market (“ATM”) Equity Program pursuant to which the Company could sell up to 32,000,000 shares of their Common Stock from time to time through Maxim as their sales agent (the “Agent”). Under the Old EDA, the Agent was entitled to a commission at a fixed commission rate of 4.0% of the gross sales price per Share sold, up to aggregate gross proceeds of $10,000,000, and, thereafter, at a fixed commission rate of 3.0% of the gross sales price per Share sold. The Company had no obligation to sell any shares under this program, and could at any time terminate the Agreement.				On July 23, 2012, the Company entered into a new Equity Distribution Agreement (the “New EDA”) with Maxim pursuant to which the Company may sell up to $75,000,000 worth of its shares of Common Stock from time to time through Maxim, as sales agent. Under the New EDA, Maxim is entitled to a fixed commission rate of 4.0% of the gross sales price of Shares sold under the EDA, up to aggregate gross proceeds of $10,000,000, and thereafter, at a fixed commission rate of 3.0% of the gross sales price of Shares sold under the EDA. Sales of the Shares, if any, may be made in transactions that are deemed to be “at-the-market” offerings as defined in Rule 415 under the Securities Act of 1933, as amended, including sales made by means of ordinary brokers’ transactions, including on the NYSE MKT, at market prices or as otherwise agreed with Maxim. The Company has no obligation to sell any of the Shares and may at any time suspend offers under the New EDA or terminate the New EDA.
Equity Distribution Agreement, Date Established		May 28, 2010				Jul. 23, 2012
Number of shares authorized under equity distribution agreement		32,000,000
Maximum dollar amount of shares under the EDA						$ 75,000,000
Fixed commission Rate for gross proceeds $10,000,000 or less		4.00%				4.00%
Commission Agreement, Gross Proceeds From Common Stock, Threshold		10,000,000				10,000,000
Fixed commission rate for gross proceeds in excess of $10,000,000		3.00%				3.00%
Number of shares to be sold under the equity distribution agreement								40,000,000	90,000,000	20,000,000	12,000,000
Number of shares sold under equity distribution agreement				520,000	0		30,470,000
Cash proceeds from shares sold under equity distribution agreement				293,000	0		23,003,000
Commissions paid on shares sold under equity distribution agreement				$ 12,000			$ 828,000
Equity Distribution Agreement, Date Expired	Jun. 01, 2012