Convertible Notes - Additional Information (Details) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended	12 Months Ended
	Oct. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) TradingDays shares	Dec. 31, 2020 USD ($) $ / shares	Dec. 01, 2020 USD ($)
Debt Instrument [Line Items]
Derivative liabilities fair value		$ 18,400	$ 0	$ 0	$ 18,400	$ 4,600
Issuance costs		9,700			9,700
Unamortized discount		$ 9,600	6,300	6,300	$ 9,600
Debt instrument, effective interest rate		8.70%			8.70%
Amortization of debt discount and non-cash interest				1,572	$ 3,656
Interest income (expense), net				12,636	9,915
Stock Issued During Period Value Conversion Of Convertible Securities	$ 20,200			$ 44,606	18,750
Stock Issued During Period Shares New Issues | shares				4,336,938
Inducement Loss	$ 9,800
Gains Losses On Extinguishment Of Debt				$ 946	10,952
Interest Expense
Debt Instrument [Line Items]
Amortization of debt discount and non-cash interest				1,600
Interest and Other Income (Expense), Net
Debt Instrument [Line Items]
Change in fair value of derivative liability				18,400
Minimum
Debt Instrument [Line Items]
Inducement Loss			1,400
7.25% Convertible Senior Notes due 2025
Debt Instrument [Line Items]
Principal amount		$ 168,500	126,400	$ 126,400	$ 168,500
Debt instrument, annual interest rate		7.25%			7.25%
Debt instrument, issuance date		Dec. 07, 2020
Debt instrument, frequency of periodic payment		semi-annually
Debt instrument due date		Dec. 01, 2025
Debt instrument, initial payment date		Jun. 01, 2021
Debt instrument, convertible, initial conversion rate per $1,000 principal amount of convertible notes		278.0094
Debt instrument convertible initial conversion price | $ / shares		$ 3.60			$ 3.60
Debt instrument, redemption period, start date				Dec. 01, 2023
Debt instrument, convertible, threshold percentage of stock price trigger				130.00%
Debt instrument, convertible, threshold trading days | TradingDays				20
Debt instrument, convertible, threshold consecutive trading days | TradingDays				30
Events of default, description				The Convertible Notes have customary provisions relating to the occurrence of “Events of Default” (as defined in the Indenture), which include the following: (i) certain payment defaults on the Convertible Notes (which, in the case of a default in the payment of interest on the Convertible Notes, will be subject to a 30-day cure period); (ii) the Company’s failure to send certain notices under the Indenture within specified periods of time; (iii) the Company’s failure to comply with certain covenants in the Indenture relating to the Company’s ability to consolidate with or merge with or into, or sell, lease or otherwise transfer, in one transaction or a series of transactions, all or substantially all of the assets of the Company and its subsidiaries, taken as a whole, to another person; (iv) a default by the Company in its other obligations or agreements under the Indenture or the Convertible Notes if such default is not cured or waived within 60 days after notice is given in accordance with the Indenture; (v) certain defaults by the Company or any of its subsidiaries with respect to indebtedness for borrowed money of at least $7.5 million; (vi) the rendering of certain judgments against the Company or any of its subsidiaries for the payment of at least $7.5 million, where such judgments are not discharged or stayed within 60 days after the date on which the right to appeal has expired or on which all rights to appeal have been extinguished; and (vii) certain events of bankruptcy, insolvency and reorganization involving the Company or any of the Company’s significant subsidiaries
Amortization of debt discount and non-cash interest					$ 100
Interest income (expense), net				$ 11,700
7.25% Convertible Senior Notes due 2025 | Minimum
Debt Instrument [Line Items]
Debt instrument, debt default, amount			$ 7,500	7,500
Common Stock [Member]
Debt Instrument [Line Items]
Stock Issued During Period Value Conversion Of Convertible Securities				$ 13	$ 1
Stock Issued During Period Shares New Issues | shares	8,513,850			75,162,049
Common Stock [Member] | Minimum
Debt Instrument [Line Items]
Stock Issued During Period Shares New Issues | shares	427,804
Common Stock [Member] | Early Voluntary Conversion Option
Debt Instrument [Line Items]
Stock Issued During Period Value Conversion Of Convertible Securities				$ 15,600