Share-based Compensation - Share-based Compensation Plan - Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	12 Months Ended
	Feb. 12, 2021	Mar. 31, 2021	Dec. 31, 2020
Options
Options, outstanding beginning balance (in shares)		8,744,765
Options, granted (in shares)	1,372,587	2,550,977
Options, exercised (in shares)		(229,379)
Options, forfeited (in shares)		(236,876)
Options, expired (in shares)		(2,003,988)
Options, outstanding ending balance (in shares)		8,825,499	8,744,765
Options, vested and expected to vest ending balance (in shares)		8,290,411
Options, Vested (in shares)		3,356,692
Weighted Average Exercise Price
Weighted average exercise price, outstanding beginning balance (in dollars per share)		$ 20.42
Weighted average exercise price, granted (in dollars per share)	$ 22.85	22.39
Weighted average exercise price, exercised (in dollars per share)		13.43
Weighted average exercise price, forfeited (in dollars per share)		30.60
Weighted average exercise price, expired (in dollars per share)		40.98
Weighted average exercise price, outstanding ending balance (in dollars per share)		16.23	$ 20.42
Weighted average exercise price, vested and expected to vest, ending balance (in dollars per share)		16.15
Weighted Average Exercise Price, vested (in dollars per shares)		$ 14.60
Options, Additional Disclosures
Weighted average remaining contractual term, outstanding (in years)		7 years 5 months 8 days	7 years 2 months 8 days
Weighted average remaining contractual term, vested and expected to vest (in years)		7 years 4 months 13 days
Weighted Average Remaining Contractual Term, vested (in years)		6 years 5 months 23 days
Aggregate intrinsic value, outstanding		$ 81,230	$ 4,656
Aggregate intrinsic value, vested and expected to vest, ending balance		77,128
Aggregate intrinsic value, vested		$ 37,958
Unvested options, forfeited (in shares)	179,959
Unvested options, expired (in shares)	1,934,446