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Real Estate Assets and Lease Intangibles (Summary of the properties owned) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2012 sqft	Dec. 31, 2011 sqft
Real Estate And Accumulated Depreciation [Line Items]
Real estate assets and lease intangibles, net	$ 148,409,439	$ 133,336,214
Havana Parker [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Jun. 01, 2006	Jun. 01, 2006
Geographic Location Of Property	Aurora, Colorado	Aurora, Colorado
Rentable square feet	114,000	114,000
Properties Descriptions	Office	Office
Real estate assets and lease intangibles, net	5,268,100	5,399,500
Garden Gateway Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Mar. 01, 2007	Mar. 01, 2007
Geographic Location Of Property	Colorado Springs, Colorado	Colorado Springs, Colorado
Rentable square feet	115,052	115,052
Properties Descriptions	Office	Office
Real estate assets and lease intangibles, net	12,627,500	13,008,600
World Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Sep. 01, 2007	Sep. 01, 2007
Geographic Location Of Property	San Bernardino, California	San Bernardino, California
Rentable square feet	55,098	55,098
Properties Descriptions	Retail	Retail
Real estate assets and lease intangibles, net	6,908,100	6,933,700
Reqatta Square [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Oct. 01, 2007	Oct. 01, 2007
Geographic Location Of Property	Denver, Colorado	Denver, Colorado
Rentable square feet	5,983	5,983
Properties Descriptions	Retail	Retail
Real estate assets and lease intangibles, net	1,989,000	2,027,600
Sparkys Palm Self Storage [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Nov. 01, 2007	Nov. 01, 2007
Geographic Location Of Property	Highland, California	Highland, California
Rentable square feet	50,250	50,250
Properties Descriptions	Self-Storage	Self-Storage
Real estate assets and lease intangibles, net	4,514,600	4,598,900
Sparky's Joshua Self-Storage [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Dec. 01, 2007	Dec. 01, 2007
Geographic Location Of Property	Hesperia, California	Hesperia, California
Rentable square feet	149,750	149,750
Properties Descriptions	Self-Storage	Self-Storage
Real estate assets and lease intangibles, net	7,026,500	7,155,800
Executive Office Park [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Jul. 01, 2008	Jul. 01, 2008
Geographic Location Of Property	Colorado Springs, Colorado	Colorado Springs, Colorado
Rentable square feet	65,084	65,084
Properties Descriptions	Office	Office
Real estate assets and lease intangibles, net	8,568,600	8,710,100
Pacific Oaks Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Sep. 01, 2008	Sep. 01, 2008
Geographic Location Of Property	Escondido, California	Escondido, California
Rentable square feet	16,000	16,000
Properties Descriptions	Office	Office
Real estate assets and lease intangibles, net	4,458,300	4,536,200
Morena Office Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Jan. 01, 2009	Jan. 01, 2009
Geographic Location Of Property	San Diego, California	San Diego, California
Rentable square feet	26,784	26,784
Properties Descriptions	Office	Office
Real estate assets and lease intangibles, net	5,935,600	5,918,800
Fontana Medical Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Feb. 01, 2009	Feb. 01, 2009
Geographic Location Of Property	Fontana, California	Fontana, California
Rentable square feet	10,500	10,500
Properties Descriptions	Office	Office
Real estate assets and lease intangibles, net	2,071,200	2,118,400
Rangewood Medical Office Building [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Mar. 01, 2009	Mar. 01, 2009
Geographic Location Of Property	Colorado Springs, Colorado	Colorado Springs, Colorado
Rentable square feet	18,222	18,222
Properties Descriptions	Office	Office
Real estate assets and lease intangibles, net	2,361,400	2,407,300
Sparky's Thousand Palms Self-Storage [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Aug. 01, 2009	Aug. 01, 2009
Geographic Location Of Property	Thousand Palms, California	Thousand Palms, California
Rentable square feet	113,126	113,126
Properties Descriptions	Self-Storage	Self-Storage
Real estate assets and lease intangibles, net	5,724,600	5,832,400
Sparky's Hesperia East Self-Storage [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Dec. 01, 2009	Dec. 01, 2009
Geographic Location Of Property	Hesperia, California	Hesperia, California
Rentable square feet	72,940	72,940
Properties Descriptions	Self-Storage	Self-Storage
Real estate assets and lease intangibles, net	2,703,300	2,724,800
Sparky's Rialto Self-Storage [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	May 01, 2010	May 01, 2010
Geographic Location Of Property	Rialto, California	Rialto, California
Rentable square feet	101,343	101,343
Properties Descriptions	Self-Storage	Self-Storage
Real estate assets and lease intangibles, net	5,067,500	5,144,700
Genesis Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Aug. 01, 2010	Aug. 01, 2010
Geographic Location Of Property	San Diego, California	San Diego, California
Rentable square feet	57,685	57,685
Properties Descriptions	Office	Office
Real estate assets and lease intangibles, net	9,266,800	9,428,200
Dakota Bank Buildings [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	May 01, 2011	May 01, 2011
Geographic Location Of Property	Fargo, North Dakota	Fargo, North Dakota
Rentable square feet	119,749	119,749
Properties Descriptions	Office	Office
Real estate assets and lease intangibles, net	8,823,300	9,287,000
Yucca Valley Retail Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Sep. 01, 2011	Sep. 01, 2011
Geographic Location Of Property	Yucca Valley, California	Yucca Valley, California
Rentable square feet	103,596	85,996
Properties Descriptions	Retail	Retail
Real estate assets and lease intangibles, net	7,591,200	6,687,600
Sparky's Sunrise Self-Storage [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Dec. 01, 2011	Dec. 01, 2011
Geographic Location Of Property	Hesperia, California	Hesperia, California
Rentable square feet	93,851	93,851
Properties Descriptions	Self-Storage	Self-Storage
Real estate assets and lease intangibles, net	2,203,300	2,207,200
Port of San Diego Complex [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	Dec. 01, 2011	Dec. 01, 2011
Geographic Location Of Property	San Diego, California	San Diego, California
Rentable square feet	146,700	146,700
Properties Descriptions	Industrial	Industrial
Real estate assets and lease intangibles, net	14,351,900	14,500,000
Shoreline Medical Building [Member]
Real Estate And Accumulated Depreciation [Line Items]
Acquisition Date	May 01, 2012
Geographic Location Of Property	Half Moon Bay, California
Rentable square feet	15,335
Properties Descriptions	Office
Real estate assets and lease intangibles, net	6,304,000
NetREIT Inc Properties [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real estate assets and lease intangibles, net	123,764,800	118,626,800
Model Home Properties Held In Limited Partnerships [Member]
Real Estate And Accumulated Depreciation [Line Items]
Properties Descriptions	Residential	Residential
Real estate assets and lease intangibles, net	18,677,100	10,027,900
Model Home Properties Held In Income and Investment Funds [Member]
Real Estate And Accumulated Depreciation [Line Items]
Properties Descriptions	Residential	Residential
Real estate assets and lease intangibles, net	5,967,500	4,681,500
Model Home Properties [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real estate assets and lease intangibles, net	$ 24,644,600	$ 14,709,400

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Location of real estate investment

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- Definition

Date the property was acquired, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

-Section S99

-Paragraph 6

-Subparagraph (SX 210.5-04.(c) Schedule III)

-URI http://asc.fasb.org/extlink&oid=6882300&loc=d3e5864-122674



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule III

-Article 5



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 28

-Article 12



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 970

-SubTopic 360

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-28)

-URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024

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This description includes the geographical location and the type of property (unimproved land, parking garage, shopping center, garden apartment, retail outlet, multi-tenant commercial), and may include the name of the property (such as ABC Shopping Center). An amount not exceeding five percent of the total carrying amount of all real estate investments may be described as miscellaneous investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 970

-SubTopic 360

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-28)

-URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

-Section S99

-Paragraph 6

-Subparagraph (SX 210.5-04.(c) Schedule III)

-URI http://asc.fasb.org/extlink&oid=6882300&loc=d3e5864-122674

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- Definition

Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.1(d))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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