Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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 months endedMarch 31, 2020 and 2019 (in thousands):

	Three Months Ended March 31,
	2020		2019
Research and development	$	125	$	124
General and administrative	442		423
Total share-based compensation expense	$	567	$	547

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, 2020 were as follows (in thousands):

	Stock Options		Restricted Stock Units		Restricted Stock
Unrecognized compensation cost	$	891	$	267	$	260
Expected weighted-average period in years of compensation cost to be recognized	1.93		0.89		0.75

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 endedMarch 31, 2020 and 2019 were as follows (in thousands):

	Stock Options
	Three Months Ended March 31,
	2020		2019
Total fair value of shares vested	$	502	$	372
Weighted average estimated fair value of shares granted	$	2.16	$	3.24