Fair Value Measurements. (Details) - USD ($) |
Mar. 31, 2022 |
Dec. 31, 2021 |
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| Fair Value Disclosures [Abstract] | ||
| Fair value | $ 1,000,000 | $ 1,000,000 |
| X | ||||||||||
- Definition Fair value portion of assets classified as held for sale. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- References No definition available.
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