Stockholders Equity - Stock Offerings (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Mar. 07, 2022	Jun. 30, 2022	Oct. 07, 2021	Jun. 17, 2021	Jun. 04, 2021
Shelf Registration Statement, 2020 Shelf
Subsidiary, Sale of Stock [Line Items]
Shelf registration, amount authorized				$ 100.0
Shelf registration, remaining amount available for sale		$ 43.0
Shelf Registration Statement, 2020 Shelf, At-the-market Sales Agreement
Subsidiary, Sale of Stock [Line Items]
At-the-market sales agreement, amount authorized					$ 30.0
At-the-market sales agreement, remaining amount available for sale		$ 12.2
Issuance of common stock (in shares)		2,430,784
Proceeds from issuance of common stock		$ 5.1
Underwriting discounts, commissions, and other offering expenses		0.2
Shelf Registration Statement, 2021 Shelf
Subsidiary, Sale of Stock [Line Items]
Shelf registration, amount authorized			$ 100.0
Shelf registration, remaining amount available for sale		$ 92.4
Shelf Registration Statement, 2021 Shelf, Underwritten Public Offering, March 2022
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock (in shares)	3,030,000
Share price (in dollars per share)	$ 1.25
Proceeds from issuance of common stock and warrants	$ 7.6
Commission and other costs	$ 0.8