Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Stock-based Compensation

Summary of stock option activity

	Shares	Weighted average exercise price
Outstanding at January 1, 2017	784,011	$	10.70
Options granted	141,000	15.80
Options exercised	—	—
Options cancelled	—	—
Outstanding at March 31, 2017	925,011	$	11.48
Exercisable at March 31, 2017	149,882	$	12.78

Schedule of stock-based compensation expense

Stock-based compensation expense during the three months ended March 31, 2017 and 2016 was as follows (in thousands):

	Three Months Ended March 31,
	2017		2016
Stock-based compensation expense by type of award:
Stock options	$	454	$	—
Restricted stock	148		—
Total stock-based compensation expense	$	602	$	—
Effect of stock-based compensation expense by line item:
Research and development	$	138	$	—
General and administrative	464		—
Total stock-based compensation expense included in net loss	$	602	$	—

Schedule of unrecognized stock-based compensation expense

Unrecognized stock-based compensation expense as of March 31, 2017 was as follows (in thousands):

	Unrecognized stock compensation expense		Weighted average remaining period (in years)
Stock options	$	5,783	2.83
Restricted stock	1,210		2.21
Total	$	6,993	2.72