Line of Credit and Long-Term Debt - Outstanding Indebtedness and Respective Principal Maturities (Details)	12 Months Ended
Dec. 31, 2021 USD ($)
Maturities of Long-term Debt [Abstract]
2022	$ 4,475,000
2023	4,694,000
2024	4,901,000
2025	5,114,000
2026	5,340,000
Thereafter	28,260,000
Total	$ 52,784,000
Term Loan
Debt Instrument [Line Items]
Stated Rate	1.70%
Effective Rate	4.16%
Maturities of Long-term Debt [Abstract]
2022	$ 4,221,000
2023	4,429,000
2024	4,624,000
2025	4,825,000
2026	5,038,000
Thereafter	27,700,000
Total	50,837,000
RLOC
Debt Instrument [Line Items]
Face amount	35,000,000
Maturities of Long-term Debt [Abstract]
2022	0
2023	0
2024	0
2025	0
2026	0
Thereafter	0
Total	$ 0
RLOC \| Selected LIBOR rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
RLOC \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Promissory note
Debt Instrument [Line Items]
Stated Rate	4.25%
Effective Rate	4.25%
Maturities of Long-term Debt [Abstract]
2022	$ 254,000
2023	265,000
2024	277,000
2025	289,000
2026	302,000
Thereafter	560,000
Total	$ 1,947,000

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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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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