Debt (Details) (USD $)		1 Months Ended				3 Months Ended	1 Months Ended	3 Months Ended		74 Months Ended			0 Months Ended
	Apr. 19, 2013 Series A preferred stock	Feb. 28, 2013 10% Convertible promissory notes Series A preferred stock	Jan. 31, 2012 Short term convertible notes issued January 2012	Nov. 30, 2012 Short term convertible notes issued September and November 2012	Nov. 30, 2012 Short term convertible notes issued September and November 2012 Warrant Estimated fair value	Nov. 30, 2012 Short term convertible notes issued September and November 2012 Series A preferred stock Warrant	Feb. 28, 2013 Short term convertible notes issued September 2012	Mar. 31, 2014 Short term convertible notes issued September 2012 Interest Expense	Mar. 31, 2013 Short term convertible notes issued September 2012 Interest Expense	Mar. 31, 2014 Short term convertible notes issued September 2012 Interest Expense	May 29, 2013 Pfizer Note	Apr. 28, 2008 Pfizer Note	Jul. 02, 2013 Pfizer Note Series A-1 preferred stock	May 29, 2013 Pfizer Note Series A-1 preferred stock
Debt
Aggregate principal amount		$ 15,700,000	$ 6,000,000	$ 9,700,000								$ 5,000,000
Interest rate (as a percent)			10.00%	10.00%								8.931%
Accrued interest		900,000
Conversion of convertible promissory notes into Series A preferred stock (in shares)		16,623,092
Conversion price (in dollars per share)		$ 1.00
Outstanding principal amount											7,800,000
Fair value of beneficial conversion feature							300,000
Amortization of debt discount and beneficial conversion								0	200,000	300,000
Aggregate purchase price of warrants						9,700
Estimated fair value of warrants					300,000
Short term borrowings with related parties, net of debt discount				$ 9,400,000
Preferred stock, shares issued														6,750,000
Share price of preferred stock (in dollars per share)	$ 1.00													$ 1.1560
Number of shares of preferred stock converted into shares of common stock													966,218