Summary of Significant Accounting Policies - Energy Assets (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Revenue, Major Customer [Line Items] | ||
| Grant proceeds | $ 774 | $ 1,874 |
| Deferred grant income | 6,481 | 6,631 |
| United States | ||
| Revenue, Major Customer [Line Items] | ||
| Deferred grant income | $ 8,498 | $ 8,271 |
| X | ||||||||||
- Definition Grant Proceeds No definition available.
|
| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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. No definition available.
|
| X | ||||||||||
- Details
|