Redeemable Convertible Preferred Stock Warrants and Common Stock Warrants (Tables)

12 Months Ended

Dec. 31, 2020

Liabilities And Stockholders Equity [Abstract]

Schedule of Redeemable Convertible Preferred Stock Warrant Liability using Black-Scholes Option-Pricing Model

The redeemable convertible preferred stock warrant liability was valued using the following assumptions under the Black-Scholes option-pricing model:

	September 14, 2020 (Conversion Date)			April 28, 2020 (Issuance Date of PacWest Warrants)			December 31, 2019
Stock price	$	16.59		$	11.61		$	11.32
Expected term (years)	5.86 - 6.62				7.00		6.57 - 6.74
Expected volatility	81.1% - 82.1%				91.17	%	82.1% - 93.3%
Risk-free interest rate	0.35% - 0.42%				0.52	%	1.53% - 1.93%
Dividend yield		0	%		0	%		0	%

Schedule of Outstanding Warrants

The following table provides a roll forward of outstanding warrants:

	Number of Warrants			Weighted Average Exercise Price		Weighted Average Contractual Term (Years)
Outstanding and exercisable warrants to purchase    preferred shares as of December 31, 2019		1,781,387		$	1.4034
Issued		128,260
Impact of converting to warrants for the purchase of common stock    and adjusted for the Exchange Ratio and Reverse Stock Split		(1,683,456	)
Outstanding and exercisable warrants to purchase    common stock as of December 31, 2020		226,191		$	11.3177		5.66

Schedule of Outstanding Warrants to Purchase Shares of Common Stock

As of December 31, 2020, the Company’s outstanding warrants to purchase shares of common stock, including the New PacWest Warrant, consisted of the following:

Issuance Date	Number of Shares of Common Stock Issuable		Exercise Price		Classification	Expiration Date
September 15, 2020		101,610	$	11.3177	Equity	July 25, 2026
September 15, 2020		30,924	$	11.3177	Equity	August 21, 2026
September 15, 2020		77,312	$	11.3177	Equity	September 19, 2026
September 15, 2020		11,044	$	11.3177	Equity	September 26, 2026
September 15, 2020		5,301	$	11.3177	Equity	April 28, 2027
		226,191

Schedule of Outstanding Warrants to Purchase Shares of Redeemable Convertible Preferred Stock

As of December 31, 2019, the Company’s outstanding warrants to purchase shares of redeemable convertible preferred stock (which converted into warrants to purchase common stock upon close of the Merger) consisted of the following (not adjusted for the Exchange Ratio):

Warrant Name	Issuance Date	Number of Shares of Preferred Stock Issuable		Exercise Price		Exercisable for	Classification	Expiration Date
Series B warrants	July 25, 2019		819,438	$	1.4034	Series B	Liability	July 25, 2026
Series B warrants	August 21, 2019		249,394	$	1.4034	Series B	Liability	August 21, 2026
Series B warrants	September 19, 2019		623,486	$	1.4034	Series B	Liability	September 19, 2026
Series B warrants	September 26, 2019		89,069	$	1.4034	Series B	Liability	September 26, 2026
			1,781,387