Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements Of Operations
Revenue	$ 10us-gaap_Revenues	$ 27us-gaap_Revenues
Operating costs and expenses
Cost of revenues		3us-gaap_CostOfRevenue
Amortization of patents	9,831us-gaap_AdjustmentForAmortization	267us-gaap_AdjustmentForAmortization
Compensation and related expenses (including stock-based compensation)	13,710	9,783
Research and development		10us-gaap_ResearchAndDevelopmentExpense
Professional fees	4,520us-gaap_ProfessionalFees	4,143us-gaap_ProfessionalFees
Rent	864us-gaap_LeaseAndRentalExpense	134us-gaap_LeaseAndRentalExpense
Depreciation		24us-gaap_Depreciation
Other selling, general and administrative	1,696	1,010
Total operating expenses	30,621us-gaap_OperatingExpenses	15,374us-gaap_OperatingExpenses
Loss from operations	(30,611)us-gaap_OperatingIncomeLoss	(15,347)us-gaap_OperatingIncomeLoss
Other income (expense)
Other income, net	31us-gaap_OtherIncome
Fair value adjustments for warrant liabilities	48us-gaap_FairValueAdjustmentOfWarrants	(2,618)us-gaap_FairValueAdjustmentOfWarrants
Total other income (expense)	79us-gaap_NonoperatingIncomeExpense	(2,618)us-gaap_NonoperatingIncomeExpense
Net loss	$ (30,532)us-gaap_NetIncomeLoss	$ (17,965)us-gaap_NetIncomeLoss
Net loss per share, basic and diluted	$ (1.55)us-gaap_EarningsPerShareBasicAndDiluted	$ (13.64)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average number of common shares outstanding, Basic and diluted	19,736,842	1,317,472

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