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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense for Options Granted Reflected in the Consolidate Statement of Operations and Comprehensive Loss

Stock-based compensation expense for stock options and RSUs is reflected in the condensed consolidated statements of operations and comprehensive loss as follows (in thousands):

			Three months ended June 30,												Six months ended June 30,
			2023						2022						2023						2022
General and administrative			$	1,987					$	1,495					$	3,939					$	3,711
Research and development			645						584						1,382						1,667
Total			$	2,632					$	2,079					$	5,321					$	5,378

Schedule of Company's Stock Option Activity

The following table summarizes the Company's stock option activity:

			Number of Shares						Weighted Average Exercise Price						Weighted Average Remaining Contractual Life (years)						Aggregate Intrinsic Value (in thousands)
Stock options outstanding at December 31, 2022			10,851,287						$	2.95					8.3						$	1,385
Granted			4,722,889						$	1.07
Exercised			(240,000)						$	0.41
Forfeited			(1,195,241)						$	2.63
Stock options outstanding at June 30, 2023			14,138,935						$	2.40					8.4						$	236
Stock options exercisable at June 30, 2023			6,465,712						$	2.70					7.6						$	176

Share-based Payment Arrangement, Restricted Stock Unit, Activity

The following table summarizes the Company's RSU activity:

			Number of Shares						Weighted Average Grant Date Fair Value
RSUs outstanding at December 31, 2022			924,810						$	4.12
Granted			3,186,442						$	1.20
Vested			(245,758)						$	4.44
Forfeited			(418,671)						$	1.83
RSUs outstanding at June 30, 2023			3,446,823						$	1.68

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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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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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