Line of Credit - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Short Term Debt [Line Items]
Line of credit facility, maximum amount outstanding during period	$ 10,000,000
Maturity date	Mar. 31, 2022
Term loan, duration	2 years
Line of credit facility, conversion of outstanding principal balance to term loan of fee	0.25%
Line of credit extended maturity date	Mar. 31, 2026
Line of credit facility, description	the company has the option prior to the end of the extended maturity date to convert the then outstanding principal balance on the line of credit to a two-year term loan - for a fee of one-quarter of one percent (0.25%) – thereby extending the maturity date to March 2026.
Line of credit facility, description	interest on the outstanding principal was payable monthly and accrued at the per annum rate of the greater of (i) five percent (5%) or (ii) the sum of the one-month LIBOR rate plus three and one-quarter percent (3.25%).
Line of credit facility, interest rate	5.00%
Pledged loans, principal amount	$ 20,472,000	$ 20,068,000
Debt issuance costs	0	110,000
Amortization of debt issuance costs	55,000	41,000
Maximum [Member]
Short Term Debt [Line Items]
Pledged loans, advance amount	$ 10,000,000	$ 10,000,000
Revolving Credit Facility [Member]
Short Term Debt [Line Items]
Line of credit facility, interest rate	5.00%
Compensating balance, minimum	$ 1,000,000.0
Interest on non maintenance of compensating balance	0.25%
Line of credit facility, average rate	50.00%
Line of credit facility, unused line of fee	0.50%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Short Term Debt [Line Items]
Line of credit facility, interest rate	3.25%
Revolving Credit Facility [Member] | Ameribor
Short Term Debt [Line Items]
Line of credit facility, interest rate	3.25%
Line Of Credit [Member]
Short Term Debt [Line Items]
Debt issuance costs	$ 110,000
Line Of Credit [Member] | Financial Asset, 61 Days Past Due [Member]
Short Term Debt [Line Items]
Loan payment, quarterly	10.00%
Line Of Credit [Member] | Maximum [Member]
Short Term Debt [Line Items]
Debt service coverage ratio	2.00
Line Of Credit [Member] | Minimum [Member]
Short Term Debt [Line Items]
Minimum tangible net worth	$ 50,000,000
Debt service coverage ratio	1.00