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Amount of financial asset impairment cost measured at fair value on recurring basis using unobservable input (level 3).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

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Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Indicates line item in statement in which net income is reported that includes gain (loss) from liability measured at fair value using unobservable input (level 3).

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Fair Value Measurements - Recurring (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Jul. 31, 2019	Jan. 31, 2018
Fair Value Measurements
Cash and cash equivalents	$ 75,709	$ 35,793
Marketable securities	33,747	120,475
Derivative liabilities	102	52,050
Reconciliation of items measured at fair value on a recurring basis that used significant unobservable inputs (Level 3)
Balance at the beginning of the period	52,050	224,037
Conversion of financial instruments	(1,109)	(25,656)
(Gain) Loss on fair value adjustment of option		(43,745)
(Gain) Loss on change in fair value of derivatives	$ (50,839)	$ (178,425)
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss)	Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss)
(Gain) Loss on extinguishment of option		$ 101
Financial asset impairment cost, net		138
Transfers into Level 3		81,417
Transfers out of Level 3	$ 0	(5,817)
Balance at the end of the period	102	52,050
2023 Notes
Fair Value Measurements
Derivative liabilities				$ 17,300
2025 Notes
Fair Value Measurements
Derivative liabilities	100	7,900	$ 38,300
Recurring \| Embedded conversion option \| 2023 Notes
Fair Value Measurements
Derivative liabilities		20
Recurring \| Embedded conversion option \| PHC Notes
Fair Value Measurements
Derivative liabilities		44,191
Recurring \| Embedded conversion option \| 2025 Notes
Fair Value Measurements
Derivative liabilities	102	7,859
Recurring \| Money market funds
Fair Value Measurements
Cash and cash equivalents	72,953	34,658
Recurring \| Corporate debt securities
Fair Value Measurements
Marketable securities	7,982	32,142
Recurring \| Commercial paper
Fair Value Measurements
Marketable securities	7,598	41,503
Recurring \| Asset backed Securities
Fair Value Measurements
Marketable securities		8,260
Recurring \| Government and agency securities
Fair Value Measurements
Marketable securities	18,167	38,570
Recurring \| Level 1 \| Money market funds
Fair Value Measurements
Cash and cash equivalents	72,953	34,658
Recurring \| Level 1 \| Government and agency securities
Fair Value Measurements
Marketable securities	18,167	31,627
Recurring \| Level 2 \| Embedded conversion option \| 2023 Notes
Fair Value Measurements
Derivative liabilities		20
Recurring \| Level 2 \| Corporate debt securities
Fair Value Measurements
Marketable securities	7,982	32,142
Recurring \| Level 2 \| Commercial paper
Fair Value Measurements
Marketable securities	7,598	41,503
Recurring \| Level 2 \| Asset backed Securities
Fair Value Measurements
Marketable securities		8,260
Recurring \| Level 2 \| Government and agency securities
Fair Value Measurements
Marketable securities		6,943
Recurring \| Level 3 \| Embedded conversion option \| PHC Notes
Fair Value Measurements
Derivative liabilities		44,191
Recurring \| Level 3 \| Embedded conversion option \| 2025 Notes
Fair Value Measurements
Derivative liabilities	$ 102	$ 7,859