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Fair Value of Financial Assets and Liabilities (Schedule of Financial Assets and Liabilities Measured) (Details) - Recurring basis - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets: |  |
Cash equivalents | $ 4,477 | $ 5,326
Total Assets | 4,477 | 5,326
Level 1 |  |
Assets: |  |
Cash equivalents | 4,477 | 5,326
Total Assets | 4,477 | 5,326
Level 2 |  |
Assets: |  |
Cash equivalents | 0 | 0
Total Assets | 0 | 0
Level 3 |  |
Assets: |  |
Cash equivalents | 0 | 0
Total Assets | $ 0 | $ 0

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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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