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Company and Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($) | Sep. 30, 2021 | Dec. 31, 2020
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Accounting Policies [Abstract] |  |
Cash, FDIC Insured Amount | $ 250,000 |
Cash, Uninsured Amount | $ 73,900,000 | $ 31,400,000

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Definition The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant