Stockholders' Equity (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands					12 Months Ended
	Dec. 15, 2015	Dec. 14, 2015	Sep. 16, 2015	Jul. 23, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011	Dec. 08, 2011
Preferred stock,authorized					5,000,000	5,000,000
Preferred stock par value (in dollars per share)					$ 0.01	$ 0.01
Preferred stock,issued
Preferred stock,outstanding
Common stock,authorized					350,000,000	350,000,000		350,000,000	200,000,000
Common stock,restrictions usage									75,000,000
Common stock, increase authorized									150,000,000
Common stock,unrestrictions usage			67,000,000
Common stock,outstanding					247,559,487	204,004,818
Proceeds from sale of common stock, net of issuance costs					$ 9,681	$ 12,817	$ 249
2009 Equity Incentive Plans [Member]
Number of additional authorized shares under plan			7,000,000
Prospectus Supplement New Equity Distribution Agreement (New EDA) [Member] | Maxim Group LLC (Sales Agent) [Member]
Maximum number of shares issued upon transaction	0	40,995,890
Proceeds from sale of common stock, net of issuance costs		$ 9,681,000
Payments for commissions		$ 299,000
Prospectus Supplement New Equity Distribution Agreement (New EDA) [Member] | Restricted Common Shares [Member]
Maximum number of shares issued upon transaction			60,000,000
Equity Distribution Agreement (EDA) [Member] | Maxim Group LLC (Sales Agent) [Member]
Maximum number of shares issued upon transaction				75,000,000
Percentage of fixed commissions aggregate gross proceeds up to $10,000,000				4.00%
Percentage of fixed commissions aggregate gross proceeds after $10,000,000				3.00%
Equity Distribution Agreement (EDA) [Member] | Chardan Capital Markets, LLC [Member]
Percentage of fixed commissions aggregate gross proceeds	3.00%