Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

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, 2022 and 2021 (in thousands):

	Three Months Ended March 31,
	2022		2021
Research and development	$	218	$	96
General and administrative	542		501
Total share-based compensation expense	$	760	$	597

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, 2022 were as follows (in thousands):

	Stock Options		Restricted Stock Units		Restricted Stock
Unrecognized compensation cost	$	814	$	444	$	1,004
Expected weighted-average period in years of compensation cost to be recognized	1.77		0.96		2.25

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 three months ended March 31, 2022 and 2021 were as follows (in thousands):

	Stock Options
	Three Months Ended March 31,
	2022		2021
Total fair value of shares vested	$	377	$	397
Weighted average estimated fair value of shares granted	$	0.62	$	1.08