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Fair Value Accounting (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value Accounting |  |
Other investments, at fair value | $ 334 | $ 293
Fair Value Transfers Between Levels | 0 |
Recurring |  |
Fair Value Accounting |  |
Other investments, at fair value | 334 | 293
Recurring | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value Accounting |  |
Other investments, at fair value | 334 | 293
Recurring | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value Accounting |  |
Other investments, at fair value | $ 0 | $ 0

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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740 + Details
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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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- Definition Amount of transfers of financial instruments classified measured on a recurring basis between the fair value hierarchy level 1, level 2 and level 3. + References No definition available. + Details
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