Equity Transactions (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Jan. 24, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 14, 2021
Schedule of Equity Method Investments [Line Items]
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
2022 Public Offering
Schedule of Equity Method Investments [Line Items]
Number of shares issued in transaction (in shares)	9,175,000
Number of warrants exercised (in shares)		1,425,000
Exercise price of warrants (usd per share)		$ 0.01
Price of stock sold (in usd per share)	$ 1.50
Consideration received	$ 14.3
Net proceeds	$ 12.7
2022 Public Offering | Prefunded Warrant
Schedule of Equity Method Investments [Line Items]
Number of warrants issued in transaction (in shares)	325,000
Class of warrant or right, number of securities called by warrants or rights (in shares)	325,000
Exercise price of warrants (usd per share)		$ 0.01
Warrants outstanding (in shares)		300,000
2022 Public Offering | Firm Purchase Warrants
Schedule of Equity Method Investments [Line Items]
Number of warrants issued in transaction (in shares)	9,500,000
Class of warrant or right, number of securities called by warrants or rights (in shares)	9,500,000
2022 Public Offering | Option Shares
Schedule of Equity Method Investments [Line Items]
Number of shares issued in transaction (in shares)	1,425,000
2022 Public Offering | Option Purchase Warrants
Schedule of Equity Method Investments [Line Items]
Number of warrants issued in transaction (in shares)	1,425,000
2022 Public Offering | Stock warrants
Schedule of Equity Method Investments [Line Items]
Exercise price of warrants (usd per share)		$ 1.50
Warrants outstanding (in shares)		10,900,000
2020 Public Offering
Schedule of Equity Method Investments [Line Items]
Class of warrant or right, number of securities called by warrants or rights (in shares)		700,000
Number of warrants exercised (in shares)		1,000,000
Exercise price of warrants (usd per share)		$ 2.25
Warrants outstanding (in shares)		1,400,000