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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of Common Shares That Were Excluded From The Diluted Net Loss Per Share Calculation Because of Their Anti-Dilutive Effect

The following table summarizes potential shares of common stock that were excluded from diluted net loss per share calculation because of their anti-dilutive effect:

			Year Ended December 31,
			2023						2022						2021
Options to purchase common stock			1,128,864						1,018,095						874,082
Service-based restricted stock units			274,794						212,964						204,005
Performance-based restricted stock units			—						9,328						55,279
Convertible preferred stock			275						275						275
Convertible notes			254,165						254,165						254,165
Total			1,658,098						1,494,827						1,387,806

Schedule of Assumptions Used To Estimate The Fair Value Of Stock Options

The weighted average assumptions used in the Black-Scholes model for option grants to employees and directors are presented below:

			Year Ended December 31,
			2023						2022						2021
Risk-free interest rate			4.05%						2.05%						0.91%
Expected volatility			100%						94%						93%
Expected life in years			5.5						5.7						6
Dividend yield			—						—						—

The weighted average assumptions used in the Black-Scholes model for option grants to non-employees are presented below:

			Year Ended December 31,
			2023						2022						2021
Risk-free interest rate			3.90%						1.96%						1.45%
Expected volatility			89%						87%						87%
Expected life in years			10						10						10
Dividend yield			—						—						—

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482662/260-10-50-1

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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.

+ References

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-Topic 718
-SubTopic 10
-Subparagraph (f)(2)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
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