Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

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 months ended March 31, 2021 and 2020 (in thousands):

	Three Months Ended March 31,
	2021		2020
Research and development	$	96	$	125
General and administrative	501		442
Total share-based compensation expense	$	597	$	567

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 March 31, 2021 were as follows (in thousands):

	Stock Options		Restricted Stock Units		Restricted Stock
Unrecognized compensation cost	$	395	$	537	$	575
Expected weighted-average period in years of compensation cost to be recognized	1.82		1.39		2.21

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 three months ended March 31, 2021 and 2020 were as follows (in thousands):

	Stock Options
	Three Months Ended March 31,
	2021		2020
Total fair value of shares vested	$	397	$	502
Weighted average estimated fair value of shares granted	1.08		2.16