Stockholders' Deficit - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Jul. 31, 2021	Aug. 31, 2020
Employee Stock Option
Class Of Stock [Line Items]
Unrecognized compensation expense	$ 1.1
Compensation expense period expected to be recognized	2 years 5 months 19 days
Restricted Stock Units
Class Of Stock [Line Items]
Unrecognized compensation expense	$ 0.1
Compensation expense period expected to be recognized	1 year 3 months 25 days
Vested and unissued RSU awards, description	Vested and unissued awards at March 31, 2022 represents RSU awards for which the vesting date was March 31, 2022, but for which issuance of the awards occurred in April 2022.
Vested and unissued RSU awards vesting date	Mar. 31, 2022
Vested and unissued RSU awards issuance date	Apr. 30, 2022
2020 Equity Incentive Plan
Class Of Stock [Line Items]
Shares reserved for issuance			744,685
Number of shares available for issuance	580,735
2014 Equity Incentive Plan
Class Of Stock [Line Items]
Shares reserved for issuance			68,552
Number of shares available for issuance			0
2021 Inducement Plan
Class Of Stock [Line Items]
Shares reserved for issuance		300,000
Number of shares available for issuance	160,000
Common Stock
Class Of Stock [Line Items]
Conversion of Series A convertible preferred stock for common stock, shares	158,466
Series A Preferred
Class Of Stock [Line Items]
Preferred stock, shares converted	23,770
Preferred stock, shares outstanding	0
March 2022 Purchase Agreement
Class Of Stock [Line Items]
Warrant issuance, description	Each unit consists of one share of common stock (or one pre-funded warrant in lieu thereof), a common warrant to purchase one share of common stock with a term of 24 months from the issuance date, and a common warrant to purchase one share of common stock with a term of 66 months from the issuance date.
Percentage Of Minimum Aggregate Number Of Shares Beneficially Owned By Holder	4.99%
Percentage Increase In Ownership Cap	9.99%
Pre Funded Warrants
Class Of Stock [Line Items]
Exercise price of warrants	$ 0.001
Pre Funded Warrants | March 2022 Purchase Agreement
Class Of Stock [Line Items]
Exercise price of warrants	$ 0.001
Percentage Of Minimum Aggregate Number Of Shares Beneficially Owned By Holder	9.99%
Investor | March 2022 Purchase Agreement
Class Of Stock [Line Items]
Exercise price of warrants	$ 2.062
Gross Proceeds From Issuance Of Warrants	$ 7.5
Number of securities called by warrants	3,244,987
Investor | Minimum | Pre Funded Warrants | March 2022 Purchase Agreement
Class Of Stock [Line Items]
Exercise price of warrants	$ 0.001
Cantor Fitzgerald And Co | March 2022 Purchase Agreement
Class Of Stock [Line Items]
Agent fee	$ 0.3
Additional transaction costs	$ 0.1