Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement, Noncash Expense [Abstract]

Schedule Share-based Compensation Expense

The following table summarizes the components of share-based compensation expense for the three and nine months ended September 30, 2020 and 2019 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Research and development	$	58	$	54	$	240	$	229
General and administrative	171		200		850		818
Total share-based compensation expense	$	229	$	254	$	1,090	$	1,047

Schedule of Total Compensation Cost Related to Nonvested Awards

Total compensation cost related to non-vested awards not yet recognized and the weighted-average periods over which the awards were expected to be recognized at September 30, 2020 were as follows (in thousands):

	Stock Options		Restricted Stock Units		Restricted Stock
Unrecognized compensation cost	$	530	$	221	$	76
Expected weighted-average period in years of compensation cost to be recognized	1.69		1.67		0.25

Schedule of Fair Value of Share-based Compensation Awards

Total fair value of shares vested and the weighted average estimated fair values of shares granted for the nine months ended September 30, 2020 and 2019 were as follows (in thousands):

	Stock Options
	Nine Months Ended September 30,
	2020		2019
Total fair value of shares vested	$	535	$	398
Weighted average estimated fair value of shares granted	$	2.12	$	3.18