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Stock-based compensation (Tables)

9 Months Ended

Sep. 30, 2015

Stock-based compensation

Summary of the Company's stock option activity

		Shares		Weighted- Average  Exercise Price			Weighted- Average  Remaining  Contractual  Term (years)		Agregate  Intrinsic Value  (in thousands)
Outstanding at December 31, 2014		1,226,140		$	4.14		8.15		$	6,579
Granted		550,797		11.69
Exercised		(25,045	)	2.05
Cancelled or forfeited		(39,881	)	5.46
Outstanding at September 30, 2015		1,712,011		$	6.57		8.11		$	4,560
Exercisable at September 30, 2015		755,860		$	3.27		6.89		$	3,659
Vested or expected to vest at September 30, 2015		1,586,233		$	6.30		8.02		$	4,489

Schedule of stock-based compensation expense

Total stock-based compensation expense is recognized for stock options granted to employees and non-employees and has been reported in the Company’s statements of operations as follows (in thousands):

		Three Months Ended September 30,						Nine Months Ended September 30,
		2015			2014			2015			2014
Research and development		$	173		$	100		$	505		$	289
General and administrative		315			132			638			316
Total		$	488		$	232		$	1,143		$	605

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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.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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