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Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($)	Dec. 31, 2021	Aug. 20, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	$ 94,696,000		$ 0
Long-Term Investments	54,816,000		0
Warrants liabilitites		$ 17,900,000	1,700,000
Earn-out shares liability		$ 101,700,000
Embedded derivative liability on convertible notes	0		6,400,000
Common Stock Private Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	140,225
Common Stock Public Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	7,400,000
Non-U.S. government and supranational bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	16,387,000
Long-Term Investments	3,753,000
Corporate debt security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	71,349,000
Long-Term Investments	42,457,000
U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	3,408,000
Long-Term Investments	2,196,000
Asset-backed security and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	2,551,000
Long-Term Investments	5,410,000
Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	1,001,000
Long-Term Investments	1,000,000
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	8,320,000
Short-Term Investments	94,696,000
Long-Term Investments	54,816,000
Warrants liabilitites			1,707,000
Earn-out shares liability	29,240,000
Embedded derivative liability on convertible notes			6,394,000
Total Financial Liabilities	36,736,000		8,101,000
Fair Value, Recurring | Common Stock Private Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	140,000
Fair Value, Recurring | Common Stock Public Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	7,356,000
Fair Value, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	5,868,000
Fair Value, Recurring | Non-U.S. government and supranational bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	647,000
Short-Term Investments	16,387,000
Long-Term Investments	3,753,000
Fair Value, Recurring | Corporate debt security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	1,805,000
Short-Term Investments	71,349,000
Long-Term Investments	42,457,000
Fair Value, Recurring | U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	3,408,000
Long-Term Investments	2,196,000
Fair Value, Recurring | Asset-backed security and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	2,551,000
Long-Term Investments	5,410,000
Fair Value, Recurring | Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	1,001,000
Long-Term Investments	1,000,000
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	5,868,000
Short-Term Investments	3,408,000
Long-Term Investments	2,196,000
Warrants liabilitites			0
Earn-out shares liability	0
Embedded derivative liability on convertible notes			0
Total Financial Liabilities	7,356,000		0
Fair Value, Recurring | Level 1 | Common Stock Private Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	0
Fair Value, Recurring | Level 1 | Common Stock Public Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	7,356,000
Fair Value, Recurring | Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	5,868,000
Fair Value, Recurring | Level 1 | Non-U.S. government and supranational bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0
Short-Term Investments	0
Long-Term Investments	0
Fair Value, Recurring | Level 1 | Corporate debt security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0
Short-Term Investments	0
Long-Term Investments	0
Fair Value, Recurring | Level 1 | U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	3,408,000
Long-Term Investments	2,196,000
Fair Value, Recurring | Level 1 | Asset-backed security and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0
Long-Term Investments	0
Fair Value, Recurring | Level 1 | Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0
Long-Term Investments	0
Fair Value, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	2,452,000
Short-Term Investments	91,288,000
Long-Term Investments	52,620,000
Warrants liabilitites			0
Earn-out shares liability	0
Embedded derivative liability on convertible notes			0
Total Financial Liabilities	140,000		0
Fair Value, Recurring | Level 2 | Common Stock Private Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	140,000
Fair Value, Recurring | Level 2 | Common Stock Public Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	0
Fair Value, Recurring | Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0
Fair Value, Recurring | Level 2 | Non-U.S. government and supranational bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	647,000
Short-Term Investments	16,387,000
Long-Term Investments	3,753,000
Fair Value, Recurring | Level 2 | Corporate debt security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	1,805,000
Short-Term Investments	71,349,000
Long-Term Investments	42,457,000
Fair Value, Recurring | Level 2 | U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0
Long-Term Investments	0
Fair Value, Recurring | Level 2 | Asset-backed security and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	2,551,000
Long-Term Investments	5,410,000
Fair Value, Recurring | Level 2 | Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	1,001,000
Long-Term Investments	1,000,000
Fair Value, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0
Short-Term Investments	0
Long-Term Investments	0
Warrants liabilitites			1,707,000
Earn-out shares liability	29,240,000
Embedded derivative liability on convertible notes			6,394,000
Total Financial Liabilities	29,240,000		$ 8,101,000
Fair Value, Recurring | Level 3 | Common Stock Private Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	0
Fair Value, Recurring | Level 3 | Common Stock Public Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liabilitites	0
Fair Value, Recurring | Level 3 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0
Fair Value, Recurring | Level 3 | Non-U.S. government and supranational bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0
Short-Term Investments	0
Long-Term Investments	0
Fair Value, Recurring | Level 3 | Corporate debt security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0
Short-Term Investments	0
Long-Term Investments	0
Fair Value, Recurring | Level 3 | U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0
Long-Term Investments	0
Fair Value, Recurring | Level 3 | Asset-backed security and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0
Long-Term Investments	0
Fair Value, Recurring | Level 3 | Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0
Long-Term Investments	$ 0

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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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Fair value portion 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.

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