Stockholders' Equity - Share Activity (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Activity of Shares [Roll Forward]
Common stock, shares outstanding (in shares)	67,432,712
Shares issued (in shares)	11,619
Common stock, shares outstanding (in shares)	145,971,184	67,432,712
Class A-1 Convertible Preferred Stock
Activity of Shares [Roll Forward]
Preferred stock, shares outstanding (in shares)	257,000	416,000
Conversions of convertible preferred stock (in shares)	0	(159,000)
Preferred stock, shares outstanding (in shares)	256,700	257,000
Class A-1 Convertible Preferred Stock | 2020 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)		0
Class A-1 Convertible Preferred Stock | 2021 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)	0
Class A-2 Convertible Preferred Stock
Activity of Shares [Roll Forward]
Preferred stock, shares outstanding (in shares)	1,416,453	3,288,000
Conversions of convertible preferred stock (in shares)	(85,000)	(1,872,000)
Preferred stock, shares outstanding (in shares)	1,330,832	1,416,453
Class A-2 Convertible Preferred Stock | 2020 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)		0
Class A-2 Convertible Preferred Stock | 2021 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)	0
Class A-3 Convertible Preferred Stock
Activity of Shares [Roll Forward]
Preferred stock, shares outstanding (in shares)	259,000	0
Conversions of convertible preferred stock (in shares)	0	(14,000)
Preferred stock, shares outstanding (in shares)	258,707	259,000
Class A-3 Convertible Preferred Stock | 2020 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)		273,000
Class A-3 Convertible Preferred Stock | 2021 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)	0
Class A-4 Convertible Preferred Stock
Activity of Shares [Roll Forward]
Preferred stock, shares outstanding (in shares)	0	0
Conversions of convertible preferred stock (in shares)	0	0
Preferred stock, shares outstanding (in shares)	3,725,720	0
Class A-4 Convertible Preferred Stock | 2020 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)		0
Class A-4 Convertible Preferred Stock | 2021 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)	3,726,000
Warrants
Activity of Shares [Roll Forward]
Warrants outstanding (in shares)	66,038,000	46,774,000
Conversions of convertible preferred stock (in shares)	(4,170,000)	(1,039,000)
Warrants outstanding (in shares)	61,868,000	66,038,000
Warrants | 2020 Closing
Activity of Shares [Roll Forward]
Warrants issued (in shares)		20,303,000
Warrants | 2021 Closing
Activity of Shares [Roll Forward]
Warrants issued (in shares)	0
Common stock
Activity of Shares [Roll Forward]
Common stock, shares outstanding (in shares)
Conversions of convertible preferred stock (in shares)	(3,525,000)	(21,493,000)
Common stock, shares outstanding (in shares)
Common stock | 2020 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)		24,342,000
Common stock | 2021 Closing
Activity of Shares [Roll Forward]
Shares issued (in shares)	58,923,000