Stock Authorization And Issuance (Summary Of Equity Offerings)(Details) (USD $)	0 Months Ended												12 Months Ended
	Aug. 06, 2013		Mar. 26, 2013		Sep. 19, 2012		Apr. 18, 2012		Sep. 14, 2011		Mar. 30, 2011		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 30, 2013
Equity Offerings [Line Items]
Sale of common stock, number of shares	3,681,000		4,715,000	[1]	4,382,000		8,139,000		7,800,000		3,332,117	[2]	93,208,471	82,903,609
Sale of stock price per share	$ 3.80		$ 3.25	[1]	$ 2.30		$ 1.05		$ 0.88		$ 0.71	[2]
Net Proceeds	$ 13,000,000	[3]	$ 14,300,000	[1],[3]	$ 9,200,000	[3]	$ 8,300,000	[3]	$ 6,500,000	[3]	$ 4,100,000	[2],[3]	$ 1,147,380	$ 1,381,694	$ 330,938
Percentage of outstanding common stock on an after-issued basis	4.00%	[4]	5.40%	[1],[4]	5.30%	[4]	10.70%	[4]	11.60%	[4]	10.20%	[2],[4]
Warrants recorded at fair value											$ 400,000		$ 663,100	$ 1,081,050
Price per unit																$ 0.81
Common Stock Unit [Member]
Equity Offerings [Line Items]
Sale of common stock, number of shares											2,691,360		2,691,000
Sale of stock price per share													$ 0.81
Exercise Price per Warrant													0.88
Shares issued within each unit sold											1
Warrants issued within each unit sold											0.03		807,000

[1] Ladenburg Thalmann Financial Services Inc. acted as underwriter for the transaction.

[2] Offering included the sale of 3,332,117 shares of common stock at $0.71 per share and 2,691,360 units, each consisting of one share of common stock and three-tenths of a warrant to purchase common stock, at $0.81 per unit. The warrants are exercisable beginning September 30, 2011 and expire on September 30, 2016. The warrants were recorded at their relative fair value of approximately $0.4 million as estimated at their grant date using the Black-Scholes option pricing model (see Note 8)

[3] After deduction of applicable underwriters’ discounts, placement agent fees, and other offering costs.

[4] Calculated on an after-issued basis.