Notes Payable - Narrative (Detail) $ in Thousands		1 Months Ended		3 Months Ended	12 Months Ended
	Aug. 01, 2022 USD ($)	May 31, 2019 USD ($) installment	Nov. 30, 2016 USD ($)	Mar. 31, 2024 USD ($) agreement	Dec. 31, 2023 USD ($)	Dec. 31, 2019 USD ($)	Feb. 29, 2024 USD ($)
Debt Disclosure [Line Items]
Number of offtake supply agreements (in agreements) | agreement				8
Number of offtake supply agreements with same customer (in agreements) | agreement				2
Debt instrument accrued interest				$ 100	$ 600
Notes payable, long-term				3,459	3,459
Notes payable, short-term				5,303	1,730
Principal outstanding amount					5,100
Promissory Note
Debt Disclosure [Line Items]
Prepayment from stockholder			$ 5,000
Debt instrument accrued interest		$ 200
Number of installments (in installments) | installment		3
Long-term debt, maturity, year two	$ 2,700
Long-term debt, maturity, year three	1,900
Long-term debt, maturity, year four	$ 1,800
Accrued interest rate	3.50%
Other long-term debt				5,200	5,200
Notes payable, long-term				3,500	3,500
Notes payable, short-term				1,700	1,700
Accrued interest				$ 900	$ 800
Initial term of offtake supply agreement				10 years
Promissory Note | Legacy stockholder note
Debt Disclosure [Line Items]
Principal amount	$ 5,200
Promissory Note One
Debt Disclosure [Line Items]
Debt instrument accrued interest						$ 100
Other long-term debt			$ 5,000
Aggregate principal amount						$ 5,100
Repayment period under prepayment agreement			5 years
Amount of repayment under prepayment agreement			$ 7,500
Repayment percentage of prepayment agreement amount			150.00%
Loan facility interest rate				5.60%
Loan facility term				5 years
​Repayments​ of​ installments, one							$ 2,200
​Repayments​ of​ installments, two							1,600
​Repayments​ of​ installments, three							2,100
​Repayments​ of​ installments, four							$ 2,200
Remaining outstanding principal				$ 3,600
Promissory Note One | Secured Overnight Financing Rate (SOFR)
Debt Disclosure [Line Items]
Variable interest rate				0.25%