Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

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, 2023 and 2022 (in thousands):

	Three Months Ended March 31,
	2023		2022
Research and development	$	187	$	218
General and administrative	488		542
Total share-based compensation expense	$	675	$	760

Schedule of Total Compensation Cost Related to Nonvested Awards

Total compensation cost related to unvested awards not yet recognized and the weighted-average periods over which the awards were expected to be recognized at March 31, 2023 were as follows (in thousands):

	Stock Options		Restricted Stock Units		Restricted Stock
Unrecognized compensation cost	$	1,042	$	378	$	459
Expected weighted-average period in years of compensation cost to be recognized	1.42		1.22		1.47

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, 2023 and 2022 were as follows (in thousands):

	Stock Options
	Three Months Ended March 31,
	2023		2022
Total fair value of shares vested	$	324	$	377
Weighted average estimated fair value of shares granted	$	0.78	$	0.62