Stockholders' Equity - Preferred Stock (Details)			1 Months Ended	12 Months Ended
	Feb. 06, 2014 shares	Jan. 10, 2014 person shares	Dec. 31, 2014 shares	Dec. 31, 2016 $ / shares shares	Dec. 31, 2015 $ / shares shares	Nov. 30, 2012 shares	Nov. 30, 2011 shares
Class of Stock
Preferred stock, shares authorized				5,000,000
Preferred stock, par value | $ / shares				$ 0.01
Series A preferred stock liquidation preference per share | $ / shares				1
Series A Preferred stock conversion price per share | $ / shares				$ 34.00
Series A Preferred Stock
Class of Stock
Preferred stock, shares authorized				5,000,000	5,000,000
Preferred stock, par value | $ / shares				$ 0.01	$ 0.01
Preferred stock, shares designated				1,500,000	1,500,000
Annual percentage of dividend of preferred stock				1.00%
Preferred stock, shares outstanding				1,000	1,000
Preferred stock, shares issued				1,000	1,000
Series D Convertible Preferred Stock
Class of Stock
Preferred stock, shares outstanding		1,124,260
Number of people | person		1
Preferred stock, shares issued		1,124,260
Series D Convertible Preferred Stock | Pillar I
Class of Stock
Preferred stock, shares outstanding	0
Preferred stock, shares issued							1,124,260
Shares of common stock issued upon conversion	6,266,175
Series E Convertible Preferred Stock | Pillar II
Class of Stock
Preferred stock, shares outstanding			0
Preferred stock, shares issued			424,242			424,242
Shares of common stock issued upon conversion			8,484,840