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Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 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 and six months ended June 30, 2021 and 2020 (in thousands):

			Three Months Ended June 30,												Six Months Ended June 30,
			2021						2020						2021						2020
Research and development			$	24					$	56					$	120					$	181
General and administrative			246						239						747						680
Total share-based compensation expense			$	270					$	295					$	867					$	861

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 June 30, 2021 were as follows (in thousands):

			Stock Options						Restricted Stock Units						Restricted Stock
Unrecognized compensation cost			$	338					$	407					$	493
Expected weighted-average period in years of compensation cost to be recognized			1.73						1.26						2.01

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 six months ended June 30, 2021 and 2020 were as follows (in thousands):

			Stock Options
			Six Months Ended June 30,
			2021						2020
Total fair value of shares vested			$	407					$	515
Weighted average estimated fair value of shares granted			$	1.08					$	2.12

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- Definition

Tabular disclosure of share-based payment arrangement.

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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