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Fair Value (Tables) | 3 Months Ended
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Mar. 31, 2022
Fair Value Disclosures [Abstract] |
Fair Value, Assets Measured on Recurring Basis | The following table presents the Company's fair value hierarchy for assets measured at fair value on a recurring basis (in thousands):
|  | Level in Fair Value Hierarchy |  | Fair Value
|  |  | March 31, 2022 |  | December 31, 2021
Other non-current assets: |  |  |  |  |  |
Equity securities (1) |  | 1 |  | $ | 7,360 |  |  | $ | 17,166 |
(1) Represents our investments in autonomous technology companies. For additional information regarding the valuation of these equity securities, see Note 6 – Investments.

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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