Stock Warrants - Stock Warrants (Details)						1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 16, 2020 $ / shares shares	Oct. 15, 2018 USD ($) $ / shares shares	Oct. 15, 2018 USD ($) $ / shares shares	Oct. 10, 2018 shares	Nov. 18, 2016 USD ($) item $ / shares shares	Oct. 31, 2018 $ / shares	Sep. 30, 2021 $ / shares shares	Sep. 30, 2020 shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) shares	Dec. 31, 2020 USD ($) $ / shares	Nov. 18, 2020 USD ($)	Nov. 15, 2020 $ / shares	Nov. 06, 2020 $ / shares	Nov. 05, 2020 $ / shares
Equity, Class of Treasury Stock
Proceeds from "at the market" stock issuance | $		$ 18,600,000	$ 18,600,000
Stock Issued During Period, Shares, New Issues									78,700,000
Exercise price per warrant | $ / shares	$ 0.69	$ 0.69	$ 0.69			$ 0.69							$ 1.38	$ 0.69	$ 1.38
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.001						$ 1,000		$ 1,000		$ 1,000
Effect of Warrant exercise price adjustment | $											$ 900,000
Percentage of issue of the public offering						120.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0
Cash proceeds from exercise of warrants | $									$ 8,042,000	$ 0
Proceeds from Issuance of Common Stock | $									$ 65,960,000	$ 0
Warrants Exercised							0
Series B Preferred Stock [Member]
Equity, Class of Treasury Stock
Preferred Stock, Par or Stated Value Per Share | $ / shares		$ 1,000	$ 1,000
Stock Issued During Period, Value, Issued for Services | $		$ 1,000	$ 1,000
Preferred Stock Conversion Price Per Share | $ / shares		$ 1.15	$ 1.15
Conversion of Stock, Shares Converted		13,672,173	13,672,173					1,379	3,973	3,492
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		13,672,173	13,672,173
Series A Warrants [Member]
Equity, Class of Treasury Stock
Number of Share sold | item					2
Series B Warrants [Member]
Equity, Class of Treasury Stock
Number of Shares purchase | item					1
IPO [Member]
Equity, Class of Treasury Stock
Stock Issued During Period, Shares, New Issues					714,286
Shares Issued, Price Per Share | $ / shares					$ 35.00
Class of Warrant or Right, Number of Securities Called by Warrants or Rights					1,428,571
Warrants Not Settleable in Cash, Fair Value Disclosure | $					$ 15,700,000							$ 100,000,000
IPO [Member] | Series B Warrants [Member]
Equity, Class of Treasury Stock
Exercise price per warrant | $ / shares					$ 60.20
Over-Allotment Option [Member]
Equity, Class of Treasury Stock
Stock Issued During Period, Shares, New Issues	2,428,825			2,428,825
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	2,428,825			2,428,825
Issue of warrants to purchase common stock	1,807,826			1,807,826
Underwritten Public Offering [Member] | October 2018 Warrants [Member]
Equity, Class of Treasury Stock
Warrant Term		5 years
Stock Warrants [Member] | IPO [Member] | Series A Warrants [Member]
Equity, Class of Treasury Stock
Exercise price per warrant | $ / shares					$ 50.05
Warrant [Member]
Equity, Class of Treasury Stock
Class of Warrant or Right, Number of Securities Called by Warrants or Rights							11,655,747		11,655,747
Warrant [Member] | Series B Preferred Stock [Member]
Equity, Class of Treasury Stock
Conversion of Stock, Shares Converted		13,672,173