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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 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 March 31,
(in thousands)															2024						2023
Included in research and development expense															$	389					$	394
Included in selling, general and administrative expense															735						670
Total stock-based compensation expense															$	1,124					$	1,064

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:

			Three Months Ended March 31,
			2024						2023
Risk-free interest rate			4.04		%				3.58		%
Dividend yield			0		%				0		%
Expected volatility of Cardiff Oncology common stock			107		%				110		%
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			1,720,896						$	3.51
Exercised			(33,222)						$	3.22
Forfeited and expired			(41,336)						$	10.11
Balance outstanding, March 31, 2024			8,297,292						$	4.09					$	17,780,158
Exercisable at March 31, 2024			3,735,195						$	5.10					$	7,103,808
Vested and expected to vest at March 31, 2024			8,050,310						$	4.13					$	17,126,855

Summary of Warrant Activity and Changes in Warrants Outstanding

A summary of warrant activity and changes in warrants outstanding, including both liability and equity classifications 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
Balance outstanding, March 31, 2024			2,807,948						$	2.45					1.7 years

X

- Definition

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 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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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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Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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