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Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2024

Stockholders' Equity Note [Abstract]

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense related to Cardiff Oncology equity awards have been recognized in operating results as follows:

		Three Months Ended September 30,								Nine Months Ended September 30,
(in thousands)		2024				2023				2024				2023
Included in research and development expense		$	436			$	294			$	1,223			$	985
Included in selling, general and administrative expense			817				661				2,333				2,615
Total stock-based compensation expense		$	1,253			$	955			$	3,556			$	3,600

Schedule of Assumptions to Estimate Fair Value of Stock Option Awards

The estimated fair value of stock option awards was determined on the date of grant using the Black-Scholes option valuation model with the following weighted-average assumptions during the following periods indicated:

		Nine Months Ended September 30,
		2024				2023
Risk-free interest rate			4.06	%			3.62	%
Dividend yield			0	%			0	%
Expected volatility of Cardiff Oncology common stock			106	%			109	%
Expected term		5.8 years				5.3 years

Summary of Stock Option Activity and of Changes in Stock Options Outstanding

A summary of stock option activity and changes in stock options outstanding is presented below:

		Total Options				Weighted-Average Exercise Price Per Share				Intrinsic Value
Balance outstanding, December 31, 2023			6,650,954			$	4.27			$	23,926
Granted			1,899,096			$	3.40
Exercised			(133,614	)		$	2.69
Forfeited and expired			(68,092	)		$	23.06
Balance outstanding, September 30, 2024			8,348,344			$	3.94			$	2,542,885
Exercisable at September 30, 2024			4,431,853			$	4.64			$	1,235,936
Vested and expected to vest at September 30, 2024			8,132,900			$	3.97			$	2,451,731

Summary of Warrant Activity and Changes in Warrants Outstanding

A summary of warrant activity and changes in warrants outstanding, classified as equity is presented below:

		Total Warrants				Weighted-Average Exercise Price Per Share				Weighted-Average Remaining Contractual Term
Balance outstanding, December 31, 2023			2,807,948			$	2.45			1.9 years
Expired			(595	)		$	252.72
Balance outstanding, September 30, 2024			2,807,353			$	2.40			1.2 years

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