Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets
Net operating loss carryforward	$ 7,843	$ 4,992
Stock-based compensation	8,014	8,087
Patent portfolio and other	17,298	2,865
Total deferred tax assets	33,155	15,944
Valuation Allowance	$ (33,155)	$ (15,944)
Deferred tax asset, net of allowance