Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Jul. 24, 2014	Feb. 05, 2014	Oct. 29, 2013	Dec. 31, 2016	Dec. 31, 2014	Dec. 31, 2015	Jul. 21, 2014
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)				$ 0.10		$ 0.10
Preferred stock, shares issued (in shares)				6,000		6,505
Preferred stock, shares outstanding (in shares)				6,000		6,505
Liquidated damages paid to purchasers					$ 3,420
Total preferred stock value				$ 1		$ 1
Common stock, shares authorized (in shares)				150,000,000		150,000,000
Common stock, par value (in dollars per share)				$ 0.001		$ 0.001
Common stock, shares issued (in shares)			422,819	10,834,490		10,283,393
Common stock, shares outstanding (in shares)				10,834,490		10,283,393
Proceeds from issuance of common stock			$ 6,000,000
Class of Warrant or Right [Line Items]
Total Warrants (in shares)				12,033,098
Series A Warrants [Member]
Class of Warrant or Right [Line Items]
Exercise price (in dollars per share)			$ 8.50
Warrants issued and outstanding to purchase common stock (in shares)			685,715				6,198,832
Series B warrants [Member]
Class of Warrant or Right [Line Items]
Warrants issued and outstanding to purchase common stock (in shares)			434,325
Common Stock Warrant One [Member]
Class of Warrant or Right [Line Items]
Warrants Issue Date				Apr. 26, 2013
Warrant Expiration Date				Apr. 26, 2018
Total Warrants (in shares)				69,321
Exercise price (in dollars per share)				$ 11.18
Common Stock Warrant Two [Member]
Class of Warrant or Right [Line Items]
Warrants Issue Date				Oct. 31, 2013
Warrant Expiration Date				Apr. 30, 2019
Total Warrants (in shares)				685,715
Exercise price (in dollars per share)				$ 0.75
Common Stock Warrant Three [Member]
Class of Warrant or Right [Line Items]
Warrants Issue Date				Feb. 05, 2014
Warrant Expiration Date				Feb. 05, 2019
Total Warrants (in shares)				1,329,731
Exercise price (in dollars per share)				$ 0.75
Common Stock Warrant Four [Member]
Class of Warrant or Right [Line Items]
Warrants Issue Date				Jul. 24, 2014
Warrant Expiration Date				Jul. 24, 2019
Total Warrants (in shares)				6,198,832
Common Stock Warrant Four [Member] | Minimum [Member]
Class of Warrant or Right [Line Items]
Exercise price (in dollars per share)				$ 0.75
Common Stock Warrant Four [Member] | Maximum [Member]
Class of Warrant or Right [Line Items]
Exercise price (in dollars per share)				$ 2.45
Common Stock Warrant Five [Member]
Class of Warrant or Right [Line Items]
Warrants Issue Date				Jun. 22, 2015
Warrant Expiration Date				Jun. 22, 2020
Total Warrants (in shares)				3,000,000
Exercise price (in dollars per share)				$ 0.75
Common Stock Warrant Six [Member]
Class of Warrant or Right [Line Items]
Warrants Issue Date				Dec. 30, 2015
Warrant Expiration Date				Dec. 30, 2020
Total Warrants (in shares)				650,442
Exercise price (in dollars per share)				$ 1.13
Common Stock Warrant Seven [Member]
Class of Warrant or Right [Line Items]
Warrants Issue Date				Jan. 29, 2016
Warrant Expiration Date				Jan. 29, 2021
Total Warrants (in shares)				99,057
Exercise price (in dollars per share)				$ 1.06
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)				6,000		6,505
Preferred stock, shares outstanding (in shares)				6,000		6,505
Number of preferred stock converted (in shares)	12,300			504.5
Conversion of convertible preferred stock, stated value (in dollars per share)	$ 1,000
Initial conversion price (in dollars per share)	$ 2.565
Total preferred stock value	$ 2,487
Intrinsic value of beneficial conversion feature	$ 1,887
Class of Warrant or Right [Line Items]
Exercise price (in dollars per share)	$ 2.45
Warrants issued and outstanding to purchase common stock (in shares)	4,795,321
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)		$ 0.10
Preferred stock, shares issued (in shares)		12,300
Number of preferred stock converted (in shares)	12,300
Conversion of convertible preferred stock, stated value (in dollars per share)		$ 1,000
Common Stock [Member]
Class of Stock [Line Items]
Convertible preferred stock (in shares)	4,795,321			196,686
Common Stock Equivalents of Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)		$ 0.10
Preferred stock, shares issued (in shares)		12,300
Convertible preferred stock (in shares)		1,464,287
Initial conversion price (in dollars per share)		$ 8.40
Proceeds from issuance of warrants		$ 11,458
Warrant term		5 years
Class of Warrant or Right [Line Items]
Exercise price (in dollars per share)		$ 7.40
Warrants issued and outstanding to purchase common stock (in shares)		1,329,731