CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Preferred stock, shares designated	7,534,834	7,534,474
Notes payable, net of current portion (includes notes designated at Fair Value Option)	$ 31.0	$ 7.8
Series G convertible preferred stock
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	10,000,000	10,000,000
Convertible preferred stock, shares issued	122	0
Convertible preferred stock, shares outstanding	122	0
Preferred stock, shares designated	137	0
Series H convertible preferred stock
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	10,000,000	10,000,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0
Preferred stock, shares designated	105	0
Series I convertible preferred stock
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	10,000,000	10,000,000
Convertible preferred stock, shares issued	56	0
Convertible preferred stock, shares outstanding	56	0
Preferred stock, shares designated	118	0
Common Stock | Common stock - voting
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	298,000,000	298,000,000
Common stock, shares issued	73,413,248	2,182,084
Common stock, shares outstanding	73,143,248	2,182,084
Common Stock | Common stock - non-voting
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	9	9
Common stock, shares outstanding	9	9