Borrowings, Subordinated Note Purchase Agreements (Details)		12 Months Ended
Sep. 17, 2020 USD ($) Investors	Jun. 30, 2021 USD ($)
Debt Instrument [Line Items]
Long-term borrowings		$ 0
Subordinated Note Purchase Agreements [Member]
Debt Instrument [Line Items]
Number of qualified institutional investors \| Investors	14
Interest rate	4.75%
Debt instrument, due date		Sep. 15, 2030
Aggregate principal amount	$ 20,000,000
Debt issuance costs	$ 424
Period of debt amortization	60 months
Outstanding borrowings, net of issuance costs		$ 19,600,000

Total number of qualified institutional investors entered into an agreement.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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

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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.

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Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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