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Schedule II - Valuation and Qualifying Accounts Allowance for Doubtful Accounts (Tables) | 12 Months Ended
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Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts Disclosure [Text Block] |
|  |  | Additions |  |  |  | Deductions |  |  |  |  |  |
| Balance at Beginning of Year |  | Charged to Operations |  |  |  | Written Off |  |  |  |  |  | Balance at End of Year
Allowance for Doubtful Accounts Receivable: |  |  |  |  |  |  |  |  |  |  |  |  |
2021 | $ | 17 |  |  | $ | 5 |  |  |  |  | $ | (5) |  |  |  |  |  |  | $ | 17 |
2020 | $ | 18 |  |  | $ | 4 |  |  |  |  | $ | (5) |  |  |  |  |  |  | $ | 17 |
2019 | $ | 14 |  |  | $ | 7 |  |  |  |  | $ | (3) |  |  |  |  |  |  | $ | 18 |
|  |  | Additions |  |  |  | Deductions |  |  |  |
| Balance at Beginning of Year |  | Charged to Operations |  |  |  | Credited to Operations |  |  |  |  |  | Balance at End of Year
Deferred Tax Valuation Allowance: |  |  |  |  |  |  |  |  |  |  |  |  |
2021 | $ | — |  |  | $ | — |  |  |  |  | $ | — |  |  |  |  |  |  | $ | — |
2020 | $ | — |  |  | $ | — |  |  |  |  | $ | — |  |  |  |  |  |  | $ | — |
2019 | $ | 1 |  |  | $ | — |  |  |  |  | $ | (1) |  |  |  |  |  |  | $ | — |

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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