Commitments and Contingencies - Additional Information (Details) (USD $)	1 Months Ended
	Oct. 31, 2012	Jun. 30, 2012
Commitments And Contingencies [Line Items]
Percentage of requisite preferred holders who approved plan to set aside proceeds of any sale of to be distributed	60.00%
Merck Sharp And Dohme Corporation [Member]
Commitments And Contingencies [Line Items]
Non-exclusive license agreement, milestone accrued or paid		$ 0
Minimum
Commitments And Contingencies [Line Items]
Percentage of proceeds of any sale to be distributed to employees, directors, or consultants	15.00%
Minimum | Merck Sharp And Dohme Corporation [Member]
Commitments And Contingencies [Line Items]
Non-exclusive license agreement, contingent milestone payments		50,000
Non-exclusive license agreement, future royalties		3.00%
Maximum | Merck Sharp And Dohme Corporation [Member]
Commitments And Contingencies [Line Items]
Non-exclusive license agreement, contingent milestone payments		$ 1,000,000
Non-exclusive license agreement, future royalties		6.00%