Fair Value of Financial Instruments - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended	12 Months Ended
	Jan. 13, 2016	Sep. 08, 2015	Mar. 31, 2016	Dec. 31, 2015
Redwood City, California [Member] | Level 3 [Member] | Sublease of Excess Space [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value inputs, discount rate	20.00%
NeoForce, Inc [Member] | NeoForce Group, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of royalty		$ 153	$ 172	$ 153
Fair value inputs, discount rate			20.00%