Stockholders' Equity (Narrative) (Details) (USD $)	1 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2011	Jul. 31, 2009	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2008 2007 Long Term Incentive Plan	Dec. 31, 2013 2007 Long Term Incentive Plan	Dec. 31, 2007 2007 Long Term Incentive Plan
Stockholders Equity [Line Items]
Common stock reserved							4,600,000		3,500,000
Common stock, price per share	$ 3.5
Options award term, maximum							10 years
Unrecognized share-based compensation expense related to unvested awards			$ 1,300,000	$ 1,300,000
Unrecognized compensation cost, period for recognition				1 year 9 months
Shares approved for issuance								9,300,000
Shares available to be issued								2,600,000
Number of Common Shares Underlying Warrants	371,423		5,620,128	5,620,128	5,620,128	5,573,544
Warrant exercise price	3.50
Controlled equity offering, aggregate offering price			15,000,000
Sales agent commissions, percentage			3.00%
Remaining aggregate sales available under the equity offering agreement			8,600,000	8,600,000
Number of new stock issued during the period under the controlled equity offering arrangement	1,857,143		3,883,173
Gross proceeds generated from public offering	6,500,000
Proceeds from issuance of common stock, net of offering costs	5,100,000		5,900,000	6,018,891	38,984	5,855,689
Proceeds from derivative instruments	700,000
Warrant expiration date	Jun. 15, 2016	Jan. 28, 2015
Weighted average fair value of stock options granted				$ 1.23	$ 0.86	$ 1.17
Aggregate intrinsic value of options exercised				28,000	9,000	35,000
Fair value of options vested				1,400,000	2,100,000	2,300,000
Aggregate intrinsic value of options outstanding and exercisable			$ 1,600,000	$ 1,600,000