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Real Estate Investments (Details) - Acquired Lease Intangibles (USD $)
Dec. 31, 2014
Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquired Intangible Lease Assets $ 932,882us-gaap_FiniteLivedIntangibleAssetsGross $ 932,882us-gaap_FiniteLivedIntangibleAssetsGross
Lease Intangibles Accumulated Amortization    
Acquired Finite-Lived Intangible Assets [Line Items]    
In-Place Lease Intangibles (weighted average life of 89 and 101 months, respectively) 103,666aei22_FiniteLivedIntangibleAssetsAccumulatedAmortizationInPlaceLease
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= aei22_LeaseIntangiblesAccumulatedAmortizationMember
60,377aei22_FiniteLivedIntangibleAssetsAccumulatedAmortizationInPlaceLease
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= aei22_LeaseIntangiblesAccumulatedAmortizationMember
Above-Market Lease Intangibles (weighted average life of 103 and 115 months, respectively) 87,800aei22_FiniteLivedIntangibleAssetsAccumulatedAmortizationAboveMarketLease
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= aei22_LeaseIntangiblesAccumulatedAmortizationMember
38,047aei22_FiniteLivedIntangibleAssetsAccumulatedAmortizationAboveMarketLease
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= aei22_LeaseIntangiblesAccumulatedAmortizationMember
Acquired Intangible Lease Assets 191,466us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= aei22_LeaseIntangiblesAccumulatedAmortizationMember
98,424us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= aei22_LeaseIntangiblesAccumulatedAmortizationMember
Leases, Acquired-in-Place [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
In-Place Lease Intangibles (weighted average life of 89 and 101 months, respectively) 418,089us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LeasesAcquiredInPlaceMember
418,089us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LeasesAcquiredInPlaceMember
Above Market Leases [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Above-Market Lease Intangibles (weighted average life of 103 and 115 months, respectively) $ 514,793us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_AboveMarketLeasesMember
$ 514,793us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_AboveMarketLeasesMember