Line of Credit - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Line Of Credit Facility [Line Items]
Pledged loans aggregate principal amount	$ 24,500		$ 24,500		$ 23,200
Amortization of debt issuance costs			21	$ 28
Payments of debt issuance costs			$ 0	57
Ameribor [Member]
Line Of Credit Facility [Line Items]
Line of credit facility, interest rate description			the American Financial Exchange ("Ameribor") plus three and one-quarter percent (3.25%); and (ii) five percent (5.0%)
Revolving Credit Facility [Member]
Line Of Credit Facility [Line Items]
Line of credit facility, maximum amount outstanding during period			$ 10,000
Line of credit facility, conversion of outstanding principal balance to term loan of fee			0.25%
Line of credit facility, description			RMI VIII has the option at the maturity date to convert the then outstanding principal balance under the 2022 credit agreement to a two-year term loan maturing in March 2026
Line of credit facility, interest rate description			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%		5.00%
Interest rate, increase (decrease)			0.25%
Line of credit facility, unused line of fee			0.50%
Line of credit facility, commitment fee description			there is a quarterly unused line fee equal to one-half of one percent (0.50%) per annum of the average daily difference between the average principal outstanding and fifty percent (50%) of the maximum principal of $10 million.
Amortization of debt issuance costs	$ 7	$ 7	$ 21	$ 28
Payments of debt issuance costs			57
Debt issuance costs not amortized			$ 14
Revolving Credit Facility [Member] | LIBOR [Member]
Line Of Credit Facility [Line Items]
Line of credit facility, interest rate	3.25%		3.25%
Revolving Credit Facility [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Minimum compensating balance amount	$ 1,000		$ 1,000
Revolving Credit Facility [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Line of credit facility, average rate			50.00%
Line of Credit [Member]
Line Of Credit Facility [Line Items]
Interest rate, increase (decrease)			8.62%
Minimum tangible net worth	50,000		$ 50,000
Debt instrument, covenant description			the partnership shall maintain (i) minimum tangible net worth of $50 million, net of amounts due from related companies; (ii) debt service coverage ratio at all times of not less than 2.00 to 1.00
Line of Credit [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Debt service coverage ratio			2
Line of Credit [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Debt service coverage ratio			1
Modification Agreement [Member]
Line Of Credit Facility [Line Items]
Line of credit facility, interest rate description			The fair value of the balance on the line of credit is deemed to approximate the recorded amount because the reference rate plus 3.25% and the other terms and conditions, including the two-year term, of the Revolving Line of Credit and Term Loan Agreement are reflective of market rate terms (Level 2 inputs).
Modification Agreement [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Minimum tangible net worth	30,000		$ 30,000
Debt service coverage ratio			1.25
Maximum borrowing capacity	5,000		$ 5,000
Modification Agreement [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Debt service coverage ratio			1
Modification Agreement [Member] | Maximum [Member] | Financial Asset, 61 Days Past Due [Member]
Line Of Credit Facility [Line Items]
Delinquency rate			50.00%
Maximum borrowing capacity	5,000		$ 5,000
Line of Credit One [Member]
Line Of Credit Facility [Line Items]
Net worth tangible capital partnership	45,000		45,000
Maximum borrowing capacity	9,100		9,100
Line of Credit Two [Member]
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	5,250		5,250
Line of Credit Two [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Net worth tangible capital partnership	45,000		45,000
Line of Credit Two [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Net worth tangible capital partnership	35,000		35,000
Line of Credit Three [Member]
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	3,000		3,000
Line of Credit Three [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Net worth tangible capital partnership	35,000		35,000
Line of Credit Three [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Net worth tangible capital partnership	$ 30,000		$ 30,000