Commitments and Contingencies - Additional Information (Detail)			1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 22, 2015 USD ($) ft²	Jul. 17, 2015 USD ($)	Jul. 31, 2015 USD ($) $ / h	Sep. 30, 2015 USD ($) Agreement	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Agreement	Sep. 30, 2014 USD ($)
Commitment And Contingencies [Line Items]
Rent expense				$ 86,000	$ 235,000	$ 522,000	$ 702,000
Number of additional license agreements | Agreement				2		2
License agreements fee				$ 2,300,000		$ 2,300,000
Monthly license fees		$ 8,000
Discontinued Operations, Disposed of by Sale [Member]
Commitment And Contingencies [Line Items]
Success fee payable				$ 500,000		$ 500,000
Percentage of transaction consideration				4.00%		4.00%
Payment of success fee		$ 50,000	$ 450,000
Maximum [Member]
Commitment And Contingencies [Line Items]
Milestone payments from the Company						$ 19,000,000
Maximum [Member] | Discontinued Operations, Disposed of by Sale [Member] | Services Business [Member]
Commitment And Contingencies [Line Items]
Employees hourly rate | $ / h			200
Minimum [Member] | Discontinued Operations, Disposed of by Sale [Member] | Services Business [Member]
Commitment And Contingencies [Line Items]
Employees hourly rate | $ / h			100
Jersey City, New Jersey [Member]
Commitment And Contingencies [Line Items]
Area of subleased space (in sqft) | ft²	10,141
Base rent, per month	$ 25,000
Annual increase in base rent (percent)	3.00%
Security deposit paid	$ 74,000