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Investments (Schedule of Cash Equivalents) (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Cash And Cash Equivalents [Line Items]
Cash equivalents	$ 18,488	$ 40,437	$ 52,856	$ 76,110
Cost [Member]
Cash And Cash Equivalents [Line Items]
Cash equivalents	5,560	6,954
Cost [Member] | Institutional Money Market Funds [Member]
Cash And Cash Equivalents [Line Items]
Cash equivalents	5,560	6,954
Estimated Fair Value [Member]
Cash And Cash Equivalents [Line Items]
Cash equivalents	5,560	6,954
Estimated Fair Value [Member] | Institutional Money Market Funds [Member]
Cash And Cash Equivalents [Line Items]
Cash equivalents	$ 5,560	$ 6,954

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes 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://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
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-Publisher FASB
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+ References

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