Organization and Summary of Significant Accounting Policies (Details) (USD $)	0 Months Ended	3 Months Ended	8 Months Ended	12 Months Ended				80 Months Ended
	Oct. 04, 2013	Dec. 31, 2013	Dec. 31, 2007	Dec. 31, 2013 item	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2008	Dec. 31, 2013
Organization and Summary of Significant Accounting Policies
Number of platforms				2
Initial Public Offering
Shares sold in initial public offering	7,666,667
Public offering price (in dollars per share)	$ 6.00		$ 0.001				$ 0.007
Gross proceeds from initial public offering	$ 46,000,000			$ 40,480,000				$ 40,480,000
Net proceeds from initial public offering	40,500,000
Conversion convertible preferred stock into common stock	7,229,590
Principal amount of convertible debt converted	22,100,000
Number of shares of common stock issued upon conversion of debt	3,679,401
Write-off of unamortized debt discount	300,000
Repayment of outstanding principal and unpaid accrued interest in cash	1,700,000			1,679,000				1,679,000
Common stock issuable upon redemption of exchangeable shares	480,763
Fair value adjustment charge on the exchangeable shares	$ 400,000	$ 400,000		$ 2,421,000	$ (90,000)	$ 5,000		$ 2,309,000
Warrants to purchase shares of convertible preferred stock which are converted	230,000
Warrants to purchase shares of common stock issued on conversion	36,074
Common stock authorized (in shares)	150,000,000	150,000,000		150,000,000	100,000,000			150,000,000
Preferred stock authorized (in shares)	5,000,000	5,000,000		5,000,000	0			5,000,000
Segment Reporting
Number of operating segments				1