Convertible Promissory Notes Payable, Convertible Notes Payable, Related Parties (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jan. 31, 2024	Dec. 31, 2023	Jul. 31, 2023	May 31, 2023	Nov. 30, 2022	Aug. 31, 2022
ABS Promissory Notes [Member]
Convertible Promissory Notes [Abstract]
Aggregate principal amount					$ 4.6
Interest rate					0.00%
Interest expense	$ 0.1
Securities Purchase Agreement and Future Advance Convertible Promissory Notes [Member]
Convertible Promissory Notes [Abstract]
Interest rate	15.00%
Conversion price (in dollars per share)	$ 0.04
Number of trading days	5 days
Interest expense	$ 1.6	$ 2.3
Securities Purchase Agreement and Future Advance Convertible Promissory Notes [Member] | ABS Promissory Notes [Member]
Convertible Promissory Notes [Abstract]
Aggregate principal amount			$ 4.6	$ 1.9		$ 1.2	$ 4.0	$ 16.2
Securities Purchase Agreement and Future Advance Convertible Promissory Notes [Member] | Maximum [Member]
Convertible Promissory Notes [Abstract]
Conversion price (in dollars per share)	$ 0.01
Share price (in dollars per share)	$ 0.04
Securities Purchase Agreement and Future Advance Convertible Promissory Notes [Member] | First Warrant [Member]
Convertible Promissory Notes [Abstract]
Warrants to purchase common stock (in shares)	695.6
Warrant exercise price (in dollars per share)	$ 0.067
Securities Purchase Agreement and Future Advance Convertible Promissory Notes [Member] | Second Warrant [Member]
Convertible Promissory Notes [Abstract]
Warrants to purchase common stock (in shares)	695.6
Warrant exercise price (in dollars per share)	$ 0.04