Condensed consolidated statements of operations and comprehensive loss (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Operating expenses
Research and development	$ 4,567us-gaap_ResearchAndDevelopmentExpense	$ 1,880us-gaap_ResearchAndDevelopmentExpense
General and administrative	1,472us-gaap_GeneralAndAdministrativeExpense	735us-gaap_GeneralAndAdministrativeExpense
Total operating expenses	6,039us-gaap_OperatingExpenses	2,615us-gaap_OperatingExpenses
Other income (expenses)
Bank charges and financing costs	(6)us-gaap_InterestExpense	(454)us-gaap_InterestExpense
Change in fair value of derivative liabilities (Note 7)	(7)	914
Amortization and extinguishment of remaining discount on preferred shares upon conversion of preferred shares		(1,884)
Other expenses	(360)us-gaap_OtherNonoperatingIncomeExpense	(189)us-gaap_OtherNonoperatingIncomeExpense
Total other income (expenses)	(373)us-gaap_NonoperatingIncomeExpense	(1,613)us-gaap_NonoperatingIncomeExpense
Net loss before income taxes	(6,412)	(4,228)
Net loss	(6,412)us-gaap_NetIncomeLoss	(4,228)us-gaap_NetIncomeLoss
Net loss per common stock - basic and diluted (Note 6)	$ (0.60)us-gaap_EarningsPerShareBasicAndDiluted	$ (1.28)us-gaap_EarningsPerShareBasicAndDiluted
Basic and diluted weighted average common stock outstanding (Note 6)	10,711,967	3,148,481
Comprehensive loss:
Net loss	(6,412)us-gaap_NetIncomeLoss	(4,228)us-gaap_NetIncomeLoss
Other comprehensive income - unrealized gain on available for sale securities	7
Comprehensive loss	$ (6,405)us-gaap_ComprehensiveIncomeNetOfTax	$ (4,228)us-gaap_ComprehensiveIncomeNetOfTax

Amortization and extinguishment of remaining discount on preferred stock upon conversion of preferred stock.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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