Subsequent Event (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended	9 Months Ended
	Oct. 13, 2021	Oct. 31, 2021	Feb. 29, 2020	Mar. 31, 2020	Sep. 30, 2020	Feb. 28, 2021
Subsequent Event [Line Items]
Common stock that can be purchased with warrants (in shares)			1,400,000			450,000
Public offering
Subsequent Event [Line Items]
Proceeds from issuance of common stock in public offering, net of offering costs					$ 48,434
Common stock | Public offering
Subsequent Event [Line Items]
Issuance of common stock (in shares)			17,250,000	17,250,000
Share price (in dollars per share)			$ 3.00
Proceeds from issuance of common stock in public offering, net of offering costs			$ 48,400
Subsequent event
Subsequent Event [Line Items]
Common stock that can be purchased with warrants (in shares)	13,333,324	13,333,324
Common stock that can be purchased with one-half of warrant (in shares)	1	1
Exercise price of warrants (in dollars per share)	$ 0.85
Warrants and rights outstanding, term	5 years
Subsequent event | Common stock | Public offering
Subsequent Event [Line Items]
Issuance of common stock (in shares)	26,666,648	26,666,648
Share price (in dollars per share)	$ 0.85	$ 0.85
Proceeds from issuance of common stock in public offering, net of offering costs	$ 21,100	$ 21,100