Shareholders’ Equity (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		6 Months Ended								6 Months Ended			6 Months Ended			3 Months Ended	0 Months Ended			3 Months Ended			6 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Sep. 24, 2013	Jun. 30, 2014 employee	Mar. 31, 2014	Jun. 30, 2014 Stock Option	Jun. 30, 2014 Restricted Stock	Jun. 30, 2014 Restricted Stock Research and development	Jun. 30, 2014 Restricted Stock General and administrative	Jun. 30, 2014 Common Stock	Jun. 30, 2014 Common Stock Restricted Stock	Jun. 30, 2014 Series C-1 Preferred Stock	Dec. 31, 2013 Series C-1 Preferred Stock	Jun. 30, 2014 Series C-1 Preferred Stock Common Stock	Jun. 30, 2014 Series F Preferred Stock	Dec. 31, 2013 Series F Preferred Stock	Jun. 30, 2014 Series F Preferred Stock Common Stock	Jun. 30, 2014 Consultant Restricted Stock	Jun. 30, 2014 Consultant Common Stock	Jun. 30, 2014 Director employee	Sep. 24, 2013 2013 Equity Plan	Jun. 30, 2014 2013 Equity Plan	Jan. 02, 2014 2013 Equity Plan	Jun. 30, 2014 Vesting Plan One employee	Jun. 30, 2014 Vesting Plan Two Director employee	Jun. 30, 2014 Vesting Plan Three Director employee	Jun. 30, 2014 One-year Anniversary Date of Grant	Jun. 30, 2014 One-year Anniversary Date of Grant Vesting Plan One	Jun. 30, 2014 One-year Anniversary Date of Grant Vesting Plan Three	Jun. 30, 2014 Quarterly	Jun. 30, 2014 Quarterly Vesting Plan One	Jun. 30, 2014 Quarterly Vesting Plan One	Jun. 30, 2014 Quarterly Vesting Plan Three	Jun. 30, 2014 Quarterly Vesting Plan Three	Jun. 30, 2014 In Full Vesting Plan Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock issued								5,473,751				5,341,670			129,105	2,976	2,976
Shares canceled					39,811			39,862	39,811
Shares canceled due to reverse stock split								51
Preferred stock, shares authorized		8,000,000								11,000	11,000		10,000	10,000
Preferred stock, par value		$ 0.0001								$ 0.0001	$ 0.0001		$ 0.0001	$ 0.0001
Preferred stock, shares issued										3,917	7,016		2,798	3,250
Equity plan, term	10 years
Automatic annual increase based on outstanding shares of Common Stock as of the last day of the previous year end, percent																			10.00%
Shares available for grant																				53,745	440,441
Number of employees granted stock options		3																3				3	3	3
Stock options granted		274,900	55,000
Award vesting rights, percentage																									25.00%	25.00%	33.33%		75.00%		66.66%
Period of share-based payment awards																												3 years		3 years		2 years	1 year
Weighted average grant date fair value per share of stock options granted		$ 10.73	$ 7.51
Unamortized share-based compensation expense				$ 3.3
Recognized weighted average period				47 months		18 months	29 months
Unamortized share-based compensation expense						$ 2.0	$ 9.7