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Related Party Transactions - Narrative (Detail) $ in Millions	1 Months Ended							6 Months Ended	12 Months Ended
	Feb. 28, 2021 USD ($)	Jan. 31, 2021 USD ($)	Nov. 30, 2019 USD ($)	May 31, 2019 USD ($) installment	Aug. 31, 2018 USD ($)	Dec. 31, 2016 USD ($)	Nov. 30, 2016 USD ($)	Jun. 30, 2022 USD ($) agreement numberOfCustomers	Dec. 31, 2021 USD ($)	Aug. 01, 2022 USD ($)
Debt Disclosure [Line Items]
Company received amount from agreement						$ 0.5
Invested amount for research and development					$ 1.5
Number of offtake supply agreements (in agreements) \| agreement								8
Number of offtake supply agreements with same customer (in agreements) \| agreement								2
Number of offtake agreement customers (in customers) \| numberOfCustomers								2
Liquidated damages								$ 0.2
Accrued interest								$ 5.3	$ 5.2
Other long-term debt							$ 5.0
Stockholder
Debt Disclosure [Line Items]
Number of offtake supply agreements (in agreements) \| agreement								5
Line of credit facility, interest rate								0.38%
Debt instrument, increase, accrued interest								$ 0.2	0.1
Other long-term debt								$ 5.1	5.1
Repayment period under prepayment agreement							5 years
Amount of repayment under prepayment agreement							$ 7.5
Repayment percentage of prepayment agreement amount							150.00%
Loan facility term								5 years
Stockholder \| LIBOR
Debt Disclosure [Line Items]
Line of credit facility, interest rate								0.25%
Unsecured Convertible Notes
Debt Disclosure [Line Items]
Debt conversion, converted instrument, amount	$ 50.0
Convertible notes	$ 10.0
Debt instrument, interest rate	8.00%
Promissory Note
Debt Disclosure [Line Items]
Debt instrument, interest rate				3.50%
Prepayment from stockholder							$ 5.0
Debt instrument, increase, accrued interest				$ 0.2
Number of installments (in installments) \| installment				3
Long-term debt, maturity, year two								$ 2.2
Long-term debt, maturity, year three								2.1
Long-term debt, maturity, year four								2.1
Total debt outstanding								$ 5.2	$ 5.2
Promissory Note \| Subsequent event
Debt Disclosure [Line Items]
Long-term debt, maturity, year two										$ 2.7
Long-term debt, maturity, year three										1.9
Long-term debt, maturity, year four										$ 1.8
Bridge Notes
Debt Disclosure [Line Items]
Line of credit facility, maximum borrowing capacity			$ 6.0
Line of credit facility, interest rate			10.00%
Conversion percentage of outstanding principal and unpaid accrued interest		70.00%	70.00%
Percentage of repay purchasers in cash amount during liquidation			200.00%
Debt conversion, converted instrument, amount		$ 50.0
SPAC transaction		$ 700.0
Bridge Notes \| Unsecured Convertible Notes
Debt Disclosure [Line Items]
Conversion percentage of outstanding principal and unpaid accrued interest	80.00%
Repayment premium as a percentage of principal	1