Stockholders Deficit - Additional Information (Details)				1 Months Ended	3 Months Ended						9 Months Ended	12 Months Ended
	Nov. 20, 2020 $ / shares shares	Mar. 24, 2020 USD ($) shares	Feb. 25, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) shares	Sep. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) shares	Mar. 31, 2021 USD ($) shares	Sep. 30, 2020 USD ($) shares	Jun. 30, 2020 USD ($) shares	Mar. 31, 2020 USD ($) shares	Sep. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) shares	Aug. 31, 2021 shares	Jul. 31, 2021 shares	Aug. 31, 2020 shares	Nov. 30, 2019 $ / shares	Sep. 30, 2019 $ / shares shares
Class Of Stock [Line Items]
Reverse stock split, description											On November 20, 2020, the Company completed a reverse stock split of its outstanding shares of common stock pursuant to which every fifteen (15) shares of issued and outstanding common stock were exchanged for one share of its common stock.
Stock split conversion ratio	0.067
Common stock split Price per share | $ / shares	$ 4.27
Fractional shares from reverse stock split share	0
Common stock, shares outstanding					7,513,733						7,513,733	5,199,997
Common stock, shares issued					7,513,733						7,513,733	5,199,997
2021 Inducement Plan
Class Of Stock [Line Items]
Grants					30,000						30,000
Employee Stock Option
Class Of Stock [Line Items]
Grants											70,333
Unrecognized compensation expense | $					$ 1,300,000						$ 1,300,000
Compensation expense period expected to be recognized											2 years 2 months 4 days
Restricted Stock Units R S U
Class Of Stock [Line Items]
Unrecognized compensation expense | $					$ 100,000						$ 100,000
Compensation expense period expected to be recognized											1 year 3 months 14 days
Vested and unissued RSU awards, description											Vested and unissued awards at September 30, 2021 represents RSU awards for which the vesting date was September 30, 2021, but for which issuance of the awards occurred in October 2021.
Vested and unissued RSU awards vesting date											Sep. 30, 2021
Vested and unissued RSU awards issuance date											Oct. 31, 2021
2020 Equity Incentive Plan
Class Of Stock [Line Items]
Shares reserved for issuance															744,685
Number of shares available for issuance					538,959						538,959
2014 Equity Incentive Plan
Class Of Stock [Line Items]
Shares reserved for issuance															68,552
Number of shares available for issuance															0
Amended and Restated 2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance													500,000
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance													24,285
2021 Inducement Plan
Class Of Stock [Line Items]
Shares reserved for issuance														300,000
Number of shares available for issuance					270,000						270,000
Cantor Sales Agreement
Class Of Stock [Line Items]
Common stock price per share | $ / shares																$ 0.001
Exchange Agreement
Class Of Stock [Line Items]
Common stock, shares outstanding			274,000
Conversion of convertible preferred stock into common stock			6.67
Exchange Agreement | Series A Convertible Preferred Stock
Class Of Stock [Line Items]
Issuance of common stock, shares			10,170
Preferred stock, shares issued			41,100
Preferred stock, par value | $ / shares			$ 0.001
Issuance of common stock | $			$ 600,000
Stock issued, price per share | $ / shares			$ 59.00
Preferred stock, shares converted			27,500
Preferred stock, shares outstanding					23,770						23,770
Exchange Agreement | Common Stock
Class Of Stock [Line Items]
Number of shares issued upon the conversion			183,333
LP Purchase Agreement
Class Of Stock [Line Items]
Issuance of common stock | $					$ 599,979
Common Stock
Class Of Stock [Line Items]
Number of shares issued upon the conversion									183,333		144,881
Common Stock | LP Purchase Agreement
Class Of Stock [Line Items]
Issuance of common stock, shares					101,218					41,026
Issuance of common stock | $					$ 101					$ 41
Lincoln Park | LP Purchase Agreement
Class Of Stock [Line Items]
Gross proceeds from issuance of common stock | $											$ 600,000
Common stock value right to sell, maximum | $		$ 20,000,000.0
Agreement term		36 months
Common stock, shares issued		41,026			101,218						101,218
Common stock weighted average price per share | $ / shares					$ 5.93						$ 5.93
Lincoln Park | LP Purchase Agreement | Additional Paid-In-Capital
Class Of Stock [Line Items]
Commitment consideration and related transaction costs | $												$ 100,000
Private Placement | Pre-funded Warrants
Class Of Stock [Line Items]
Number of securities called by warrants				211,784						211,784
Net proceeds from sale of warrants | $				$ 31,768
Private Placement | Institutional Accredited Investors
Class Of Stock [Line Items]
Exercise Price/Share | $ / shares																	$ 9.75
Private Placement | Institutional Accredited Investors | Pre-funded Warrants
Class Of Stock [Line Items]
Number of securities called by warrants																	360,779
Exercise Price/Share | $ / shares																	$ 9.60
Exercise price of warrants, exercisable subject to beneficial ownership limitations | $ / shares																	$ 0.15
Warrants exercised				211,784		148,995				211,784
ATM Offering
Class Of Stock [Line Items]
Gross proceeds from issuance of common stock | $											$ 11,000,000.0
Payment of sales commissions | $											300,000
Net proceeds from issuance of common stock from the ATM Offering | $											$ 10,700,000
Issuance of common stock | $						$ 3,810,621	$ 6,855,198	$ 2,557,012	$ 1,395,058	$ 2,435,912
ATM Offering | Common Stock
Class Of Stock [Line Items]
Issuance of common stock, shares						992,834	1,058,045	263,482	138,981	293,271	2,050,879
Issuance of common stock | $						$ 993	$ 1,058	$ 263	$ 139	$ 293