Stockholders' Equity (Deficit) - Summary of Common Stock Warrant Activity (Details) - Warrants - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Class Of Stock [Line Items]
Shares, Outstanding June 30, 2020	85,913
Shares, Outstanding September 30, 2020	85,913	85,913
Weighted Average Exercise Price, Outstanding June 30, 2020	$ 5.14
Weighted Average Exercise Price, Outstanding September 30, 2020	$ 5.14	$ 5.14
Aggregate Fair Market Value at Issuance, Outstanding June 30, 2020	$ 194
Aggregate Fair Market Value at Issuance, Outstanding September 30, 2020	$ 194	$ 194
Weighted Average Remaining Contractual Term (Years), Outstanding	4 years 5 months 26 days	4 years 8 months 26 days