Stockholders' Equity (Details)	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Common Shares Underlying Warrants	1,051,358
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	100,778	[1]
Issue Date	Mar. 01, 2007
Exercise Price | $ / shares	$ 3.97
Expiration Date	Mar. 01, 2017
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	903,996	[2]
Issue Date	Jul. 01, 2010
Exercise Price | $ / shares	$ 1.63
Expiration Date	Jan. 01, 2017
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	46,584	[1]
Issue Date	Mar. 01, 2012
Exercise Price | $ / shares	$ 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).