Fair Value Measurements - Financial Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Liabilities
Conversion option liability	$ 1,572	$ 8,091
Corporate bonds
Assets
Debt securities	75,626	116,616
Preferred stock
Assets
Preferred stock	14,247	14,446
Recurring
Assets
Marketable securities	89,873	132,121
Liabilities
Total liabilities	10,679	32,376
Recurring \| U.S. treasury securities
Assets
Debt securities		1,059
Recurring \| Corporate bonds
Assets
Debt securities	75,625	116,616
Recurring \| Preferred stock
Assets
Preferred stock	14,248	14,446
Recurring \| Warrant liabilities
Liabilities
Warrant liabilities	9,107	24,285
Recurring \| Conversion option liability
Liabilities
Conversion option liability	1,572	8,091
Recurring \| Level 1
Assets
Marketable securities	0	1,059
Liabilities
Total liabilities	2,208	5,469
Recurring \| Level 1 \| U.S. treasury securities
Assets
Debt securities		1,059
Recurring \| Level 1 \| Corporate bonds
Assets
Debt securities	0	0
Recurring \| Level 1 \| Preferred stock
Assets
Preferred stock	0	0
Recurring \| Level 1 \| Warrant liabilities
Liabilities
Warrant liabilities	2,208	5,469
Recurring \| Level 1 \| Conversion option liability
Liabilities
Conversion option liability	0	0
Recurring \| Level 2
Assets
Marketable securities	89,873	131,062
Liabilities
Total liabilities	0	0
Recurring \| Level 2 \| U.S. treasury securities
Assets
Debt securities		0
Recurring \| Level 2 \| Corporate bonds
Assets
Debt securities	75,625	116,616
Recurring \| Level 2 \| Preferred stock
Assets
Preferred stock	14,248	14,446
Recurring \| Level 2 \| Warrant liabilities
Liabilities
Warrant liabilities	0	0
Recurring \| Level 2 \| Conversion option liability
Liabilities
Conversion option liability	0	0
Recurring \| Level 3
Assets
Marketable securities	0	0
Liabilities
Total liabilities	8,471	26,907
Recurring \| Level 3 \| U.S. treasury securities
Assets
Debt securities		0
Recurring \| Level 3 \| Corporate bonds
Assets
Debt securities	0	0
Recurring \| Level 3 \| Preferred stock
Assets
Preferred stock	0	0
Recurring \| Level 3 \| Warrant liabilities
Liabilities
Warrant liabilities	6,899	18,816
Recurring \| Level 3 \| Conversion option liability
Liabilities
Conversion option liability	$ 1,572	$ 8,091

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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).

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-Publisher FASB
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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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-Publisher FASB
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