Stockholders' Equity (Details)			1 Months Ended	12 Months Ended
		Jun. 06, 2017 shares $ / shares	Oct. 31, 2017 shares	Dec. 31, 2017 shares $ / shares	Dec. 31, 2016 $ / shares shares
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)				10,000,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.10
Common stock, shares authorized (in shares)				150,000,000	150,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.001	$ 0.001
Common stock, shares issued (in shares)				4,304,425	2,166,898
Common stock, shares outstanding (in shares)				4,304,425	2,166,898
Class of Warrant or Right [Line Items]
Total Warrants (in shares)				2,406,625
Common Stock Warrant One [Member]
Class of Warrant or Right [Line Items]
Issue Date				Apr. 26, 2013
Expiration Date				Apr. 26, 2018
Total Warrants (in shares)				13,865
Exercise price (in dollars per share) | $ / shares				$ 55.90
Common Stock Warrant Two [Member]
Class of Warrant or Right [Line Items]
Issue Date	[1]			Oct. 31, 2013
Expiration Date	[1]			Apr. 30, 2019
Total Warrants (in shares)	[1]			137,143
Exercise price (in dollars per share) | $ / shares	[1]			$ 3.75
Common Stock Warrant Three [Member]
Class of Warrant or Right [Line Items]
Issue Date	[1]			Feb. 05, 2014
Expiration Date	[1]			Feb. 05, 2019
Total Warrants (in shares)	[1]			265,947
Exercise price (in dollars per share) | $ / shares	[1]			$ 3.75
Common Stock Warrant Four [Member]
Class of Warrant or Right [Line Items]
Issue Date				Jul. 24, 2014
Expiration Date				Jul. 24, 2019
Total Warrants (in shares)				1,239,769
Common Stock Warrant Four [Member] | Minimum [Member]
Class of Warrant or Right [Line Items]
Exercise price (in dollars per share) | $ / shares				$ 3.75
Common Stock Warrant Four [Member] | Maximum [Member]
Class of Warrant or Right [Line Items]
Exercise price (in dollars per share) | $ / shares				$ 12.25
Common Stock Warrant Five [Member]
Class of Warrant or Right [Line Items]
Issue Date				Jun. 22, 2015
Expiration Date				Jun. 22, 2020
Total Warrants (in shares)				600,000
Exercise price (in dollars per share) | $ / shares				$ 3.75
Common Stock Warrant Six [Member]
Class of Warrant or Right [Line Items]
Issue Date				Dec. 30, 2015
Expiration Date				Dec. 30, 2020
Total Warrants (in shares)				130,089
Exercise price (in dollars per share) | $ / shares				$ 5.65
Common Stock Warrant Seven [Member]
Class of Warrant or Right [Line Items]
Issue Date				Jan. 29, 2016
Expiration Date				Jan. 29, 2021
Total Warrants (in shares)				19,812
Exercise price (in dollars per share) | $ / shares				$ 5.30
Series C Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)				10,000,000	10,000,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.10	$ 0.10
Preferred stock, shares issued (in shares)				36,182	0
Preferred stock, shares outstanding (in shares)				36,182	0
Beneficial ownership percentage				9.99%
Number of shares debt convertible (in shares)				15,049,000
Number of preferred stock converted (in shares)			1,598,346
Initial stock price (in dollars per share) | $ / shares				$ 2.69
Series C Convertible Preferred Stock [Member] | Senior Secured 2.25% Convertible Debentures and Senior Secured 4% Convertible Debentures [Member]
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares		$ 1,000		$ 1,000
Number of shares debt convertible (in shares)		15,049,000
Initial stock price (in dollars per share) | $ / shares		$ 2.69
Series C Convertible Preferred Stock [Member] | Senior Secured 2.25% Convertible Debentures and Senior Secured 4% Convertible Debentures [Member] | Maximum [Member]
Class of Stock [Line Items]
Beneficial ownership percentage		9.99%
Series B Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)				10,000,000	10,000,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.10	$ 0.10
Preferred stock, shares issued (in shares)				0	6,000
Preferred stock, shares outstanding (in shares)				0	6,000

[1] These warrants are classified as liabilities (See Note 10, Warrants).