Cash Equivalents and Investments (Narrative) (Details) - USD ($) |
1 Months Ended | 3 Months Ended | 9 Months Ended |
|---|---|---|---|
Apr. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2021 |
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| Debt and Equity Securities, FV-NI [Line Items] | |||
| Debt securities realized loss | $ 400,000 | ||
| Debt securities realized gains | $ 0 | $ 0 | |
| Common Stock [Member] | |||
| Debt and Equity Securities, FV-NI [Line Items] | |||
| Investment | $ 899,000 | ||
| Maximum [Member] | Common Stock [Member] | |||
| Debt and Equity Securities, FV-NI [Line Items] | |||
| Minority investment, ownership percentage | 10.00% |
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- Definition Minority Investment, Percentage Ownership No definition available.
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- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. No definition available.
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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. No definition available.
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