Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 25
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=123466103&loc=SL6014347-161799

Convertible Senior Notes - Narrative (Details) $ / shares in Units, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	12 Months Ended
	Oct. 05, 2020 USD ($) d $ / shares	Oct. 31, 2020 USD ($)	Dec. 31, 2021 USD ($) d $ / shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Number of trading days \| d			20
Consecutive trading days \| d			30
Share price (in usd per share) \| $ / shares			$ 16.25	$ 16.25
Net equity component of debt issuance costs					$ 75,333
Borrowing rate \| Discounted Cash Flow
Debt Instrument [Line Items]
Debt borrowing rate (percent)			9.70%	9.70%
Convertible notes \| Convertible Senior Notes Due 2027
Debt Instrument [Line Items]
Debt principal issued		$ 230,000
Interest rate (percent)		2.75%
Debt issuance costs	$ 7,500	$ 7,500
Net proceeds from issuance of convertible debt		$ 222,500
Conversion ratio	0.0411794
Initial conversion price (in usd per share) \| $ / shares	$ 24.28
Fair value of convertible debt	$ 152,100
Equity component — net carrying value	77,900
Debt component of debt issuance costs	4,900
Equity component of debt issuance costs	2,500
Net equity component of debt issuance costs	75,300
Debt discount and issuance costs	$ 82,800		$ 71,835	$ 71,835	$ 80,647
Remaining term	7 years			5 years 9 months 18 days
Effective interest rate (percent)	9.90%
Convertible notes \| Convertible Senior Notes Due 2027 \| Debt conversion, scenario one
Debt Instrument [Line Items]
Closing stock price threshold as percentage of conversion price (percent)	130.00%		130.00%
Number of trading days \| d	20
Consecutive trading days \| d	30
Convertible notes \| Convertible Senior Notes Due 2027 \| Debt conversion, scenario two
Debt Instrument [Line Items]
Closing stock price threshold as percentage of conversion price (percent)	98.00%
Number of trading days \| d	5
Consecutive trading days \| d	10
Convertible notes \| Convertible Senior Notes Due 2027 \| Debt conversion, scenario three
Debt Instrument [Line Items]
Closing stock price threshold as percentage of conversion price (percent)	130.00%
Number of trading days \| d	20
Consecutive trading days \| d	30
Debt conversion, percentage of principal (percent)	100.00%