Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

A summary of stock option activity under the Sorrento Therapeutics, Inc. 2009 Stock Incentive Plan and the Sorrento Therapeutics, Inc. 2019 Stock Incentive Plan for the nine months ended September 30, 2020 is as follows (in thousands, except price data):

	Options Outstanding			Weighted- Average Exercise Price		Aggregate Intrinsic Value
Outstanding at December 31, 2019		14,586,661		$	4.36	$	5,136
Options Granted		6,339,500		$	5.25
Options Canceled		(2,682,068	)	$	4.57
Options Exercised		(1,213,924	)	$	4.21
Outstanding at September 30, 2020		17,030,169		$	4.68	$	111,676

Summary of Estimated Fair Value of Stock Option Grant Determined on Grant Date Using black-Scholes Valuation Model

The estimated fair value of each stock option grant was determined on the grant date using the Black-Scholes valuation model with the following weighted-average assumptions.

	Nine Months Ended September 30,
	2020			2019
Weighted-average grant date fair value	$	4.14		$	3.05
Dividend yield		—	%		—	%
Volatility		104	%		100	%
Risk-free interest rate		0.45	%		1.87	%
Expected life of options (years)	5.7			6.1