Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended	9 Months Ended
	Aug. 02, 2023	Jun. 14, 2023	Nov. 03, 2020	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Aug. 01, 2023	Aug. 06, 2021	Jul. 15, 2019
Class of Warrant or Right [Line Items]
Warrants issued (in shares)									2,000,000
Exercise of warrants (in shares)					0	0
Warrant exercise price (in dollars per share)									$ 0.001
Public equity
Class of Warrant or Right [Line Items]
Fair value of warrants issued				$ 5,874
Pre-Funded Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)				4,000,000
Common Stock Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)				8,850,000
Warrants issued to purchase common stock (in shares)		3,689,452			8,689,452
Proceeds from warrant exercises	$ 4,800	$ 3,542			$ 8,342
Existing Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)					1,714,429
Warrant exercise price (in dollars per share)							$ 0.96
Class of warrant or right, outstanding (in shares)							5,000,000
Stock issued during period, conversion of convertible securities (in shares)	5,000,000
Proceeds from warrant exercises	$ 4,800
New Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)							2,750,000
Warrant exercise price (in dollars per share)							$ 2.60
Remaining Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)							160,548
Warrant exercise price (in dollars per share)							$ 1.09
Minimum | Common Stock Warrants
Class of Warrant or Right [Line Items]
Warrant exercise price (in dollars per share)				$ 0.96
Maximum | Common Stock Warrants
Class of Warrant or Right [Line Items]
Warrant exercise price (in dollars per share)				$ 1.09
Senior secured notes due 2025 - first additional offering
Class of Warrant or Right [Line Items]
Fair value of warrants					$ 6,800
Fair value of warrants issued					$ 735
Senior secured notes due 2025 - first additional offering | Maximum
Class of Warrant or Right [Line Items]
Warrants issued (in shares)					2,143,000
Senior secured notes due 2025
Class of Warrant or Right [Line Items]
Interest rate									12.50%
Warrants issued (in shares)								714,000
Warrants issued to purchase common stock (in shares)			143,000