Net Income (Loss) per Common Share Applicable to Common Stockholders - Antidilutive securities (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive securities
Total antidilutive securities	14,510	75,321	61,289
Stock options
Antidilutive securities
Total antidilutive securities	5,202	4,614	4,220
Restricted stock units
Antidilutive securities
Total antidilutive securities	576	903	194
Common Stock Warrants
Antidilutive securities
Total antidilutive securities	8,732	16,968	5,099
Convertible preferred stock
Antidilutive securities
Total antidilutive securities		2,369	2,369
Future tranche right liability
Antidilutive securities
Total antidilutive securities		50,467	49,407