Convertible Preferred Stock (Details) (USD $) In Millions, except Share data, unless otherwise specified	2 Months Ended	6 Months Ended
	Mar. 31, 2014	Jun. 30, 2014 item	Jun. 11, 2014	Jun. 06, 2014	May 30, 2014	Feb. 14, 2014	Dec. 31, 2013
Series B
Convertible Preferred Stock
Number of shares issued		0					701,235
Number of shares authorized		0					980,000
Purchase price per share of convertible preferred stock (in dollars per share)		$ 61.42
Conversion price per share (in dollars per share)				$ 14.004
Preferred Stock conversion ratio (in shares)				4.386
Dividend rate (as a percent)		8.00%
Accrued dividend				$ 3.9
Number of times of original purchase price, which will be paid to the preferred stockholders		200.00%
Number of classes of stockholder voting rights, in the aggregate, for preferred stockholders, on an as-if converted basis, together with common stockholders		1
Series B | Minimum
Convertible Preferred Stock
Percentage of outstanding shares holders vote required for conversion of all shares of preferred stock		70.00%
Series B-2
Convertible Preferred Stock
Number of shares issued	448,060						0
Number of shares authorized		0					655,000
Warrants issued for purchase of shares of common stock (in shares)					10,258
Exercise price of warrants (in dollars per unit)					$ 61.42	$ 14.004
Proceeds from issuance of shares	27.5
Purchase price per share of convertible preferred stock (in dollars per share)		$ 61.42
Conversion price per share (in dollars per share)				$ 8.00
Preferred Stock conversion ratio (in shares)				7.678
Dividend rate (as a percent)		8.00%
Accrued dividend			0.7
Number of times of original purchase price, which will be paid to the preferred stockholders		150.00%
Number of classes of stockholder voting rights, in the aggregate, for preferred stockholders, on an as-if converted basis, together with common stockholders		1
Series B-2 | Minimum
Convertible Preferred Stock
Percentage of outstanding shares holders vote required for conversion of all shares of preferred stock		70.00%
Series B-2 | Maximum
Convertible Preferred Stock
Amount to be raised						40.2
Number of shares authorized						655,000
Warrants issued for purchase of shares of common stock (in shares)						718,201
Warrants issued for purchase of shares of common stock (in shares)	491,293
Series A Convertible Preferred Stock
Convertible Preferred Stock
Number of classes of stockholder voting rights, in the aggregate, for preferred stockholders, on an as-if converted basis, together with common stockholders		1
Series A-1
Convertible Preferred Stock
Number of shares issued		0					939,612
Number of shares authorized		0					1,000,000
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Conversion price per share (in dollars per share)		$ 16.970
Original conversion price per share (in dollars per share)		$ 18.564
Original preferred stock conversion ratio (in shares)		4.386
Preferred Stock conversion ratio (in shares)		4.798
Accrued dividend				18.1
Members of the Company's Board of Directors that can be elected by preferred stockholders		2
Series A-1 | After payment in full of required Series B and B-2 preferred dividends
Convertible Preferred Stock
Dividend rate (as a percent)		8.00%
Series A-1 | Liquidation, dissolution, or winding-up, payments to preferred stockholders after distribution to Series B and Series B-2 preferred stockholders
Convertible Preferred Stock
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Series A-1 | Minimum
Convertible Preferred Stock
Percentage of outstanding shares holders vote required for conversion of all shares of preferred stock		70.00%
Series A-2
Convertible Preferred Stock
Number of shares issued		0					983,208
Number of shares authorized		0					983,213
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Conversion price per share (in dollars per share)		$ 16.970
Original conversion price per share (in dollars per share)		$ 18.564
Original preferred stock conversion ratio (in shares)		4.386
Preferred Stock conversion ratio (in shares)		4.798
Accrued dividend				21.2
Series A-2 | After payment in full of required Series B, Series B-2 and A-1 preferred dividends
Convertible Preferred Stock
Dividend rate (as a percent)		8.00%
Series A-2 | Liquidation, dissolution, or winding-up, payments to preferred stockholders after distribution to Series B, SeriesB-2 and Series A-1 preferred stockholders
Convertible Preferred Stock
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Series A-2 | Minimum
Convertible Preferred Stock
Percentage of outstanding shares holders vote required for conversion of all shares of preferred stock		70.00%
Series A-3
Convertible Preferred Stock
Number of shares issued		0					142,227
Number of shares authorized		0					142,230
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Conversion price per share (in dollars per share)		$ 16.970
Original conversion price per share (in dollars per share)		$ 18.564
Original preferred stock conversion ratio (in shares)		4.386
Preferred Stock conversion ratio (in shares)		4.798
Accrued dividend				$ 3.1
Series A-3 | After payment in full of required Series B, Series B-2, Series A-1 and A-2 preferred dividends
Convertible Preferred Stock
Dividend rate (as a percent)		8.00%
Series A-3 | Liquidation, dissolution, or winding-up, payments to preferred stockholders after distribution to Series B, Series B-2, Series A-1 and Series A-2 preferred stockholders
Convertible Preferred Stock
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Series A-3 | Minimum
Convertible Preferred Stock
Percentage of outstanding shares holders vote required for conversion of all shares of preferred stock		70.00%
Series A-4
Convertible Preferred Stock
Number of shares issued		0					3,998
Number of shares authorized		0					4,000
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Conversion price per share (in dollars per share)				$ 18.564
Original preferred stock conversion ratio (in shares)		4.386
Series A-4 | Liquidation, dissolution, or winding-up, payments to preferred stockholders after distribution to Series B, Series B-2, Series A-1, Series A-2 , Series A-3, Series A-5 and Series A-6 preferred stockholders
Convertible Preferred Stock
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Series A-5
Convertible Preferred Stock
Number of shares issued		0					6,443
Number of shares authorized		0					7,000
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Conversion price per share (in dollars per share)				$ 18.564
Original preferred stock conversion ratio (in shares)		4.386
Series A-5 | Liquidation, dissolution, or winding-up, payments to preferred stockholders after distribution to Series B, Series B-2, Series A-1 and Series A-2 preferred stockholders
Convertible Preferred Stock
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Series A-6
Convertible Preferred Stock
Number of shares issued		0					496,111
Number of shares authorized		0					800,000
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42
Conversion price per share (in dollars per share)				$ 18.564
Original preferred stock conversion ratio (in shares)		4.386
Series A-6 | Liquidation, dissolution, or winding-up, payments to preferred stockholders after distribution to Series B, Series B-2, Series A-1 and Series A-2 preferred stockholders
Convertible Preferred Stock
Purchase price per share of convertible preferred stock (in dollars per share)		$ 81.42