Capital Structure - Stock Offerings (Details) - USD ($) $ in Millions		12 Months Ended
	Aug. 11, 2022	Jun. 30, 2023	Sep. 30, 2023	Sep. 28, 2021	Jun. 04, 2021	Jun. 08, 2020
Shelf Registration Statement, 2020 Shelf
Subsidiary, Sale of Stock [Line Items]
Shelf registration, amount authorized						$ 100.0
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
Issuance of common stock (in shares)		699,929
Proceeds from issuance of stock, net		$ 2.9
Shelf Registration Statement, 2021 Shelf
Subsidiary, Sale of Stock [Line Items]
Shelf registration, amount authorized				$ 100.0
Shelf registration, remaining amount available for sale			$ 82.4
Shelf Registration Statement, 2021 Shelf, Underwritten Public Offering, August 2022
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock (in shares)	1,075,290
Proceeds from issuance of common stock and warrants	$ 10.0
Underwriting discounts, commissions, and other offering expenses	$ 0.9