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Leases - Additional Information (Detail) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2020 USD ($) | Jan. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2020 USD ($) City | Dec. 31, 2019 USD ($) | Dec. 31, 2018 lease | Dec. 31, 2014
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |
Rent expense |  |  |  | $ 262 | $ 298 |  |
Number of finance lease agreements | lease |  |  |  |  |  | 3 |
Liquefaction plants and systems |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |
Equipment lease, term of contract |  |  | 1 year |  |  | 1 year |
Monthly payments |  |  | $ 13 |  |  |  |
January 2019 And Thereafter |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |
Sublease income |  | $ 2 |  |  |  |  |
Denver, Colorado |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |
Non-cancelable operating leases term |  |  |  |  |  |  | 5 years
Rent expense |  |  |  | $ 67 | $ 92 |  |
Fort Lupton, Colorado |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |
Equipment lease, term of contract | 1 year |  |  |  |  |  |
Monthly payments | $ 2 |  |  |  |  |  |
Minimum |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |
Remaining operating lease term |  |  |  | 1 year |  |  |
Maximum |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |
Remaining operating lease term |  |  |  | 5 years |  |  |
M&I Brazil |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |
Number of cities in which offices and facilities were leased | City |  |  |  | 3 |  |  |

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- Definition 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. + References No definition available. + Details
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