Stockholders' Equity - Schedule of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2020 $ / shares shares
Stockholders Equity Note [Abstract]
Outstanding at the beginning of the period (in shares) | shares	55,316,336
Cancelled and forfeited (in shares) | shares	(366,724)
Exercised (in shares) | shares	(10,529,052)
Outstanding at the end of the period (in shares) | shares	44,420,560	55,316,336
Vested and exercisable at the end of the period (in shares) | shares	34,715,518
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 1.62
Cancelled and forfeited (in dollars per share) | $ / shares	2.34
Exercised (in dollars per share) | $ / shares	0.90
Outstanding at the end of the period (in dollars per share) | $ / shares	1.78	$ 1.62
Vested and exercisable (in dollars per share) | $ / shares	$ 1.33
Weighted Average Remaining Contractual Term (Years)	5 years 9 months 10 days	5 years 9 months 7 days
Weighted Average Remaining Contractual Term, Vested and exercisable (in years)	5 years 18 days
Intrinsic value | $	$ 1,220,577
Vested and exercisable at end of period | $	$ 969,562