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Stockholders' Equity (Tables)

6 Months Ended

Jun. 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 June 30,												Six Months Ended June 30,
(in thousands)			2024						2023						2024						2023
Included in research and development expense			$	397					$	297					$	786					$	691
Included in selling, general and administrative expense			782						1,284						1,517						1,954
Total stock-based compensation expense			$	1,179					$	1,581					$	2,303					$	2,645

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:

			Six Months Ended June 30,
			2024						2023
Risk-free interest rate			4.06		%				3.61		%
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			(65,314)						$	13.96
Balance outstanding, June 30, 2024			8,351,122						$	4.02					$	1,169,885
Exercisable at June 30, 2024			4,124,114						$	4.85					$	468,750
Vested and expected to vest at June 30, 2024			8,121,830						$	4.05					$	1,118,569

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, June 30, 2024			2,807,353						$	2.40					1.4 years

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