Stock-Based Compensation - Schedule of Activities Under Company's Stock Option Plans (Details)	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Number of Options
Balance,beginning of the period | shares	12,192,216
Options granted | shares	3,416,918
Options exercised | shares	(100,990)
Option forfeited/expired | shares	(1,077,318)
Balance, end of the period | shares	14,430,826
Options Outstanding, Weighted-Average Exercise Price Per Share
Balances, beginning of the period | $ / shares	$ 9.42
Options granted | $ / shares	3.55
Options exercised | $ / shares	0.98
Option forfeited/expired | $ / shares	8.93
Balances, end of the period | $ / shares	$ 8.13