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STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Costs and expenses:    
Research and development $ 5,625us-gaap_ResearchAndDevelopmentExpense $ 2,928us-gaap_ResearchAndDevelopmentExpense
General and administrative 4,068us-gaap_GeneralAndAdministrativeExpense 4,012us-gaap_GeneralAndAdministrativeExpense
Total costs and expenses 9,693us-gaap_CostsAndExpenses 6,940us-gaap_CostsAndExpenses
Loss from operations (9,693)us-gaap_OperatingIncomeLoss (6,940)us-gaap_OperatingIncomeLoss
Interest and other income 7us-gaap_InterestAndOtherIncome 5us-gaap_InterestAndOtherIncome
Interest expense (3)us-gaap_InterestExpense (4)us-gaap_InterestExpense
Net loss and comprehensive loss (9,689)us-gaap_NetIncomeLoss (6,939)us-gaap_NetIncomeLoss
Less: Deemed preferred stock dividend   (2,026)us-gaap_PreferredStockDividendsAndOtherAdjustments
Net loss available to common stockholders $ (9,689)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ (8,965)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net loss available to common stockholders per share:    
Basic and diluted $ (0.47)us-gaap_EarningsPerShareBasicAndDiluted $ (1.04)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average shares outstanding:    
Basic and diluted 20,501,224us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 8,629,479us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted