Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2019

Stock options

Schedule of total compensation cost recognized in the statement of operations

Total compensation cost recognized for all stock option awards in the statements of operations is as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Research and development	$	611	$	503	$	1,260	$	816
General and administrative		642		828		1,819		1,607
Total	$	1,253	$	1,331	$	3,079	$	2,423

Restricted stock

Schedule of total compensation cost recognized in the statement of operations

Total compensation cost recognized for all restricted stock awards in the statements of operations is as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Research and development	$	5	$	5	$	10	$	12
General and administrative		5		11		10		40
Total	$	10	$	16	$	20	$	52