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Note 4 - Loans (Details) - Secured Loans Distributed Within California (USD $)
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
San Francisco Bay Area        
Principal $ 21,300,226us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet $ 19,185,660us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet $ 15,005,845us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet $ 14,698,430us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
Number of loans 100.00%rmiix_LoansReceivablePercentOfTotal 100.00%rmiix_LoansReceivablePercentOfTotal    
San Francisco [Member]        
San Francisco Bay Area        
Principal 6,284,854us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanFranciscoMember		 4,584,854us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanFranciscoMember		    
Number of loans 29.51%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanFranciscoMember		 23.90%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanFranciscoMember		    
Alameda [Member]        
San Francisco Bay Area        
Principal 2,315,172us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_AlamedaMember		 2,322,907us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_AlamedaMember		    
Number of loans 10.87%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_AlamedaMember		 12.11%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_AlamedaMember		    
San Mateo [Member]        
San Francisco Bay Area        
Principal 1,653,335us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanMateoMember		 1,554,577us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanMateoMember		    
Number of loans 7.76%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanMateoMember		 8.10%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanMateoMember		    
Santa Clara [Member]        
San Francisco Bay Area        
Principal 1,349,972us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SantaClaraMember		 891,674us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SantaClaraMember		    
Number of loans 6.34%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SantaClaraMember		 4.65%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SantaClaraMember		    
Contra Costa [Member]        
San Francisco Bay Area        
Principal 1,185,835us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_ContraCostaMember		 1,186,371us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_ContraCostaMember		    
Number of loans 5.57%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_ContraCostaMember		 6.18%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_ContraCostaMember		    
Sonoma [Member]        
San Francisco Bay Area        
Principal 66,867us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SonomaMember		 67,146us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SonomaMember		    
Number of loans 0.31%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SonomaMember		 0.35%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SonomaMember		    
San Francisco Bay Area [Member]        
San Francisco Bay Area        
Principal 12,856,035us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanFranciscoBayAreaMember		 10,607,529us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanFranciscoBayAreaMember		    
Number of loans 60.36%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanFranciscoBayAreaMember		 55.29%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanFranciscoBayAreaMember		    
Santa Cruz [Member]        
San Francisco Bay Area        
Principal 1,600,000us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SantaCruzMember		 2,320,000us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SantaCruzMember		    
Number of loans 7.51%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SantaCruzMember		 12.09%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SantaCruzMember		    
Monterey [Member]        
San Francisco Bay Area        
Principal 180,551us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_MontereyMember		 180,897us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_MontereyMember		    
Number of loans 0.85%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_MontereyMember		 0.95%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_MontereyMember		    
Other Northern California [Member]        
San Francisco Bay Area        
Principal 1,780,551us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_OtherNorthernCaliforniaMember		 2,500,897us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_OtherNorthernCaliforniaMember		    
Number of loans 8.36%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_OtherNorthernCaliforniaMember		 13.03%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_OtherNorthernCaliforniaMember		    
Northern California [Member]        
San Francisco Bay Area        
Principal 14,636,586us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_NorthernCaliforniaMember		 13,108,426us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_NorthernCaliforniaMember		    
Number of loans 68.72%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_NorthernCaliforniaMember		 68.32%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_NorthernCaliforniaMember		    
Los Angeles [Member]        
San Francisco Bay Area        
Principal 5,050,205us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_LosAngelesMember		 4,840,941us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_LosAngelesMember		    
Number of loans 23.71%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_LosAngelesMember		 25.23%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_LosAngelesMember		    
Orange [Member]        
San Francisco Bay Area        
Principal 432,070us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_OrangeMember		 432,828us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_OrangeMember		    
Number of loans 2.03%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_OrangeMember		 2.26%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_OrangeMember		    
San Diego [Member]        
San Francisco Bay Area        
Principal 45,068us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanDiegoMember		 66,278us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanDiegoMember		    
Number of loans 0.21%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanDiegoMember		 0.35%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanDiegoMember		    
Los Angeles & Coastal [Member]        
San Francisco Bay Area        
Principal 5,527,343us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_LosAngelesCoastalMember		 5,340,047us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_LosAngelesCoastalMember		    
Number of loans 25.95%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_LosAngelesCoastalMember		 27.84%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_LosAngelesCoastalMember		    
San Bernardino [Member]        
San Francisco Bay Area        
Principal 635,021us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanBernardinoMember		 635,768us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SanBernardinoMember		    
Number of loans 2.98%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanBernardinoMember		 3.31%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SanBernardinoMember		    
Riverside [Member]        
San Francisco Bay Area        
Principal 501,276us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_RiversideMember		 101,419us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_RiversideMember		    
Number of loans 2.35%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_RiversideMember		 0.53%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_RiversideMember		    
Other Southern California [Member]        
San Francisco Bay Area        
Principal 1,136,297us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_OtherSouthernCaliforniaMember		 737,187us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_OtherSouthernCaliforniaMember		    
Number of loans 5.33%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_OtherSouthernCaliforniaMember		 3.84%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_OtherSouthernCaliforniaMember		    
Southern California [Member]        
San Francisco Bay Area        
Principal $ 6,663,640us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SouthernCaliforniaMember		 $ 6,077,234us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
/ us-gaap_StatementGeographicalAxis
= rmiix_SouthernCaliforniaMember		    
Number of loans 31.28%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SouthernCaliforniaMember		 31.68%rmiix_LoansReceivablePercentOfTotal
/ us-gaap_StatementGeographicalAxis
= rmiix_SouthernCaliforniaMember