Stockholders' Equity (Schedule of Warrants) (Details) - $ / shares			1 Months Ended	9 Months Ended
		Oct. 13, 2015	Jul. 31, 2009	Sep. 30, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Common Shares Underlying Warrants				1,922,781
Expiration Date			Jan. 28, 2015
Warrant [Member] | Subsequent Event [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of common shares expired underlying stock purchase warrants		500,000
3.97 [Member] | Warrant [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Common Shares Underlying Warrants	[1]			100,778
Issue Date				Mar. 01, 2007
Warrant, Exercise price				$ 3.97
Expiration Date				Mar. 01, 2017
1.89 [Member] | Derivative Instrument Warrants [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Common Shares Underlying Warrants	[2],[3]			500,000
Issue Date				Apr. 01, 2010
Warrant, Exercise price				$ 1.89
Expiration Date				Oct. 01, 2015
1.63 [Member] | Derivative Instrument Warrants [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Common Shares Underlying Warrants	[2]			903,996
Issue Date				Jul. 01, 2010
Warrant, Exercise price				$ 1.63
Expiration Date				Jan. 01, 2017
3.50 [Member] | Derivative Instrument Warrants [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Common Shares Underlying Warrants	[2]			371,423
Issue Date				Jun. 01, 2011
Warrant, Exercise price				$ 3.50
Expiration Date				Jun. 01, 2016
1.61 [Member] | Warrant [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Common Shares Underlying Warrants	[1]			46,584
Issue Date				Mar. 01, 2012
Warrant, Exercise price				$ 1.61
Expiration Date				Mar. 01, 2022

[1] These warrants to purchase common stock are classified as equity.

[2] Because of the presence of net settlement provisions, these warrants to purchase common stock are classified as derivative liabilities. The fair value of these liabilities (see Note 3 – Fair Value Measurements ) is remeasured at the end of every reporting period and the change in fair value is reported in the accompanying unaudited condensed consolidated statements of operations as other income (expense).

[3] Warrants to purchase 500,000 shares of common stock expired on October 13, 2015 without being exercised. The warrants were classified as derivative liabilities.