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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Significant Accounting Policies

Schedule of Cash and Cash Equivalents

        Cash and cash equivalents consist of the following (in thousands):

		December 31,
		2015			2014
Cash		$	776		$	1,162
Money market fund			62,004			13,506
​	​	​	​	​	​	​	​
		$	62,780		$	14,668
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

Schedule of stock-based compensation expense

        During the years ended December 31, 2015, 2014 and 2013, the Company recorded stock-based compensation expense for employee and non-employee stock options and restricted stock, which was allocated as follows in the statements of operations (in thousands):

		Year Ended December 31,
		2015			2014			2013
Research and development		$	681		$	434		$	224
General and administrative			977			463			119
​	​	​	​	​	​	​	​	​	​	​
Total		$	1,658		$	897		$	343
​	​	​	​	​	​	​	​	​	​	​
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Schedule of anti-dilutive common stock equivalents excluded from calculation of diluted net loss per share

		Year Ended December 31,
		2015			2014			2013
Convertible preferred stock			—			8,012,988			8,012,988
Stock options			1,723,554			1,226,140			846,885
Common stock warrants			59,405			34,839			34,839
Preferred stock warrants			—			12,283			—
​	​	​	​	​	​	​	​	​	​	​
			1,782,959			9,286,250			8,894,712
​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​

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Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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Tabular disclosure of the components of cash and cash equivalents.

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
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