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Capital Notes (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Proceeds used to pay off debt	$ 5,000,000
2020 Offering [Member]
Debt Instrument [Line Items]
Capital notes, interest rate	3.25%
Capital notes, maturity date	Sep. 30, 2025
Principal notes	$ 10,050,000
Capital Notes 4% Due 1/24/2022 [Member]
Debt Instrument [Line Items]
Capital notes, interest rate	4.00%
Proceeds used to pay off debt	$ 5,000,000

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Contractual interest rate for funds borrowed, under the debt agreement.

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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-Publisher FASB
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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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