Manager and Other Related Parties - Summary of Organization and Offering Expenses (Parenthetical) (Details)	3 Months Ended	102 Months Ended
	Mar. 31, 2018 USD ($)	Mar. 31, 2018 USD ($)
Managers and Other Related Parties (Details) - Syndication Costs [Line Items]
Proceeds from investors admitted		$ 74,233,645
O&O expenses incurred by RMC and remaining to be reimbursed to RMC	$ 3,210,028	3,210,028
O&O expenses reimbursed period to RMC	120 months
Contributions Admitted To Members Capital
Managers and Other Related Parties (Details) - Syndication Costs [Line Items]
Proceeds from investors admitted	$ 67,106,564	$ 67,106,564