Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		12 Months Ended
	Aug. 02, 2023	Jun. 14, 2023	Nov. 03, 2020	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Aug. 01, 2023	Jun. 30, 2022	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
Adjustments to additional paid in capital, stock issued, issuance costs					$ 77
Warrants and Rights Outstanding								$ 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		$ 3,542
Adjustments to additional paid in capital, stock issued, issuance costs						$ 35
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
Proceeds from warrant exercises	$ 4,800				$ 8,307
Stock issued during period, conversion of convertible securities (in shares)	5,000,000
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
Warrants and Rights Outstanding							$ 4,671
First Additional Warrant Offering
Class of Warrant or Right [Line Items]
Warrants issued (in shares)				1,714,429
Fair value of warrants									$ 735
Warrant exercise price (in dollars per share)				$ 4.25		$ 5.38
Class of warrant or right, outstanding (in shares)				1,571,429		143,000
Initial Warrant Offering
Class of Warrant or Right [Line Items]
Fair value of warrants									$ 6,800
Warrants, $0.96 Exercise Price
Class of Warrant or Right [Line Items]
Warrants issued (in shares)							160,548
Warrant exercise price (in dollars per share)	$ 0.96
Warrants, $4.25 Exercise Price
Class of Warrant or Right [Line Items]
Warrant exercise price (in dollars per share)				$ 4.25
Class of warrant or right, outstanding (in shares)				1,571,429
Warrants, $5.38 Exercise Price
Class of Warrant or Right [Line Items]
Warrant exercise price (in dollars per share)						$ 5.38
Class of warrant or right, outstanding (in shares)						143,000
Minimum | Common Stock Warrants
Class of Warrant or Right [Line Items]
Warrant exercise price (in dollars per share)								$ 0.96
Maximum | First Additional Warrant Offering
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 to purchase common stock (in shares)			143,000