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ACQUISITIONS, DEVELOPMENT PROJECTS PLACED IN SERVICE AND DISPOSITIONS, ACQUISITIONS (Details) | 12 Months Ended
--- | ---
Apr. 30, 2015 USD ($) Unit | Apr. 30, 2014 USD ($) ft² Unit
Business Acquisition [Line Items] |  |  |  |  |
Transaction costs expensed during the period |  | $ 216,000 |  | $ 176,000 |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Total acquisition costs |  | 56,297,000 |  | 43,580,000 |
Form of consideration, cash |  | 38,606,000 |  | 38,200,000 |
Form of consideration, units | [1] | 800,000 |  | 3,480,000 |
Form of consideration, other |  | 16,891,000 | [2] | 1,900,000 | [3]
Investment allocation, land |  | 17,478,000 |  | 8,034,000 |
Investment allocation, building |  | 38,403,000 |  | 34,646,000 |
Investment allocation, intangible assets |  | 416,000 |  | 900,000 |
Goodwill, acquired during period |  | 852,000 |  |  |
Results of operations from acquired properties [Abstract] |  |  |  |  |
Total revenue |  | 2,565,000 |  | 1,897,000 |
Net income |  | (1,000) |  | (82,000) |
Multi-Family Residential [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Total acquisition costs |  | 41,780,000 |  | 19,600,000 |
Form of consideration, cash |  | 28,811,000 |  | 16,120,000 |
Form of consideration, units | [1] | 800,000 |  | 3,480,000 |
Form of consideration, other |  | 12,169,000 | [2] | 0 | [3]
Investment allocation, land |  | 2,961,000 |  | 1,447,000 |
Investment allocation, building |  | 38,403,000 |  | 17,635,000 |
Investment allocation, intangible assets |  | $ 416,000 |  | $ 518,000 |
Multi-Family Residential [Member] | Homestead Garden - Rapid City, SD [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired | [4] | Jun. 02, 2014 |  |  |
Total acquisition costs | [4] | $ 15,000,000 |  |  |
Form of consideration, cash | [4] | 5,092,000 |  |  |
Form of consideration, units | [1],[4] | 0 |  |  |
Form of consideration, other | [2],[4] | 9,908,000 |  |  |
Investment allocation, land | [4] | 655,000 |  |  |
Investment allocation, building | [4] | 14,139,000 |  |  |
Investment allocation, intangible assets | [4] | $ 206,000 |  |  |
Number of apartment units | Unit | [4] | 152 |  |  |
Goodwill, acquired during period |  | $ 852,000 |  |  |
Assumed debt |  | $ 9,908,000 |  |  |
Multi-Family Residential [Member] | Silver Springs - Rapid City, SD [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  | Jun. 02, 2014 |  |  |
Total acquisition costs |  | $ 3,280,000 |  |  |
Form of consideration, cash |  | 1,019,000 |  |  |
Form of consideration, units | [1] | 0 |  |  |
Form of consideration, other | [2] | 2,261,000 |  |  |
Investment allocation, land |  | 215,000 |  |  |
Investment allocation, building |  | 3,006,000 |  |  |
Investment allocation, intangible assets |  | $ 59,000 |  |  |
Number of apartment units | Unit |  | 52 |  |  |
Assumed debt |  | $ 2,261,000 |  |  |
Multi-Family Residential [Member] | Northridge - Bismarck, ND [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  | Sep. 12, 2014 |  |  |
Total acquisition costs |  | $ 8,500,000 |  |  |
Form of consideration, cash |  | 8,400,000 |  |  |
Form of consideration, units | [1] | 100,000 |  |  |
Form of consideration, other | [2] | 0 |  |  |
Investment allocation, land |  | 884,000 |  |  |
Investment allocation, building |  | 7,516,000 |  |  |
Investment allocation, intangible assets |  | $ 100,000 |  |  |
Number of apartment units | Unit |  | 68 |  |  |
Multi-Family Residential [Member] | Legacy Heights - Bismarck, ND [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired | [5] | Mar. 19, 2015 |  |  |
Total acquisition costs | [5] | $ 15,000,000 |  |  |
Form of consideration, cash | [5] | 14,300,000 |  |  |
Form of consideration, units | [1],[5] | 700,000 |  |  |
Form of consideration, other | [2],[5] | 0 |  |  |
Investment allocation, land | [5] | 1,207,000 |  |  |
Investment allocation, building | [5] | 13,742,000 |  |  |
Investment allocation, intangible assets | [5] | $ 51,000 |  |  |
Number of apartment units | Unit | [5] | 119 |  |  |
Multi-Family Residential [Member] | Alps Park - Rapid City, SD [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | May 01, 2013 |
Total acquisition costs |  |  |  | $ 6,200,000 |
Form of consideration, cash |  |  |  | 2,920,000 |
Form of consideration, units | [1] |  |  | 3,280,000 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 287,000 |
Investment allocation, building |  |  |  | 5,551,000 |
Investment allocation, intangible assets |  |  |  | $ 362,000 |
Number of apartment units | Unit |  |  |  | 71 |
Multi-Family Residential [Member] | Southpoint - Grand Forks, ND [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | Sep. 05, 2013 |
Total acquisition costs |  |  |  | $ 10,600,000 |
Form of consideration, cash |  |  |  | 10,400,000 |
Form of consideration, units | [1] |  |  | 200,000 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 576,000 |
Investment allocation, building |  |  |  | 9,893,000 |
Investment allocation, intangible assets |  |  |  | $ 131,000 |
Number of apartment units | Unit |  |  |  | 96 |
Multi-Family Residential [Member] | Pinecone Villas - Sartell, MN [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | Oct. 31, 2013 |
Total acquisition costs |  |  |  | $ 2,800,000 |
Form of consideration, cash |  |  |  | 2,800,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 584,000 |
Investment allocation, building |  |  |  | 2,191,000 |
Investment allocation, intangible assets |  |  |  | $ 25,000 |
Number of apartment units | Unit |  |  |  | 24 |
Healthcare [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Total acquisition costs |  |  |  | $ 18,913,000 |
Form of consideration, cash |  |  |  | 18,913,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 1,520,000 |
Investment allocation, building |  |  |  | 17,011,000 |
Investment allocation, intangible assets |  |  |  | $ 382,000 |
Healthcare [Member] | Legends at Heritage Place - Sartell, MN [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | Oct. 31, 2013 |
Total acquisition costs |  |  |  | $ 11,863,000 |
Form of consideration, cash |  |  |  | 11,863,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 970,000 |
Investment allocation, building |  |  |  | 10,511,000 |
Investment allocation, intangible assets |  |  |  | $ 382,000 |
Area of real estate property | ft² |  |  |  | 98,174 |
Healthcare [Member] | Spring Creek Fruitland - Fruitland, IA [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | Feb. 05, 2014 |
Total acquisition costs |  |  |  | $ 7,050,000 |
Form of consideration, cash |  |  |  | 7,050,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 550,000 |
Investment allocation, building |  |  |  | 6,500,000 |
Investment allocation, intangible assets |  |  |  | $ 0 |
Area of real estate property | ft² |  |  |  | 39,500 |
Unimproved Land [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Total acquisition costs |  | $ 14,517,000 |  | $ 5,067,000 |
Form of consideration, cash |  | 9,795,000 |  | 3,167,000 |
Form of consideration, units | [1] | 0 |  | 0 |
Form of consideration, other |  | 4,722,000 | [2] | 1,900,000 | [3]
Investment allocation, land |  | 14,517,000 |  | 5,067,000 |
Investment allocation, building |  | 0 |  | 0 |
Investment allocation, intangible assets |  | 0 |  | $ 0 |
Unimproved Land [Member] | Legacy Heights - Bismarck, ND [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Investment allocation, land |  | 804,000 |  |  |
Investment allocation, building |  | 7,800,000 |  |  |
Investment allocation, escrow deposit |  | $ 1,300,000 |  |  |
Unimproved Land [Member] | Creekside Crossing - Bismarck, ND [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  | May 22, 2014 |  |  |
Total acquisition costs |  | $ 4,269,000 |  |  |
Form of consideration, cash |  | 4,269,000 |  |  |
Form of consideration, units | [1] | 0 |  |  |
Form of consideration, other | [2] | 0 |  |  |
Investment allocation, land |  | 4,269,000 |  |  |
Investment allocation, building |  | 0 |  |  |
Investment allocation, intangible assets |  | $ 0 |  |  |
Unimproved Land [Member] | PrairieCare Medical - Brooklyn Park, MN [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  | Jun. 05, 2014 |  |  |
Total acquisition costs |  | $ 2,616,000 |  |  |
Form of consideration, cash |  | 2,616,000 |  |  |
Form of consideration, units | [1] | 0 |  |  |
Form of consideration, other | [2] | 0 |  |  |
Investment allocation, land |  | 2,616,000 |  |  |
Investment allocation, building |  | 0 |  |  |
Investment allocation, intangible assets |  | $ 0 |  |  |
Unimproved Land [Member] | 71 France Phase I - Edina, MN [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired | [6] | Jun. 12, 2014 |  |  |
Total acquisition costs | [6] | $ 1,413,000 |  |  |
Form of consideration, cash | [6] | 0 |  |  |
Form of consideration, units | [1],[6] | 0 |  |  |
Form of consideration, other | [2],[6] | 1,413,000 |  |  |
Investment allocation, land | [6] | 1,413,000 |  |  |
Investment allocation, building | [6] | 0 |  |  |
Investment allocation, intangible assets | [6] | $ 0 |  |  |
Interest in joint venture (in hundredths) |  | 52.60% |  |  |
JV Partner Contributions |  | $ 1,413,000 |  |  |
Unimproved Land [Member] | Monticello 7th Addition - Monticello, MN [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  | Oct. 09, 2014 |  |  |
Total acquisition costs |  | $ 1,660,000 |  |  |
Form of consideration, cash |  | 1,660,000 |  |  |
Form of consideration, units | [1] | 0 |  |  |
Form of consideration, other | [2] | 0 |  |  |
Investment allocation, land |  | 1,660,000 |  |  |
Investment allocation, building |  | 0 |  |  |
Investment allocation, intangible assets |  | $ 0 |  |  |
Unimproved Land [Member] | 71 France Phase 2 & 3 - Edina, MN [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired | [6] | Nov. 04, 2014 |  |  |
Total acquisition costs | [6] | $ 3,309,000 |  |  |
Form of consideration, cash | [6] | 0 |  |  |
Form of consideration, units | [1],[6] | 0 |  |  |
Form of consideration, other | [2],[6] | 3,309,000 |  |  |
Investment allocation, land | [6] | 3,309,000 |  |  |
Investment allocation, building | [6] | 0 |  |  |
Investment allocation, intangible assets | [6] | $ 0 |  |  |
Interest in joint venture (in hundredths) |  | 52.60% |  |  |
JV Partner Contributions |  | $ 3,309,000 |  |  |
Unimproved Land [Member] | Minot 1525 24th Ave SW - Minot, ND [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  | Dec. 23, 2014 |  |  |
Total acquisition costs |  | $ 1,250,000 |  |  |
Form of consideration, cash |  | 1,250,000 |  |  |
Form of consideration, units | [1] | 0 |  |  |
Form of consideration, other | [2] | 0 |  |  |
Investment allocation, land |  | 1,250,000 |  |  |
Investment allocation, building |  | 0 |  |  |
Investment allocation, intangible assets |  | $ 0 |  |  |
Unimproved Land [Member] | Chateau II - Minot, ND [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | May 21, 2013 |
Total acquisition costs |  |  |  | $ 179,000 |
Form of consideration, cash |  |  |  | 179,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 179,000 |
Investment allocation, building |  |  |  | 0 |
Investment allocation, intangible assets |  |  |  | $ 0 |
Unimproved Land [Member] | Jamestown Unimproved - Jamestown, ND [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | Aug. 09, 2013 |
Total acquisition costs |  |  |  | $ 700,000 |
Form of consideration, cash |  |  |  | 700,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 700,000 |
Investment allocation, building |  |  |  | 0 |
Investment allocation, intangible assets |  |  |  | $ 0 |
Unimproved Land [Member] | RED 20 - Minneapolis, MN [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired | [7] |  |  | Aug. 20, 2013 |
Total acquisition costs | [7] |  |  | $ 1,900,000 |
Form of consideration, cash | [7] |  |  | 0 |
Form of consideration, units | [1],[7] |  |  | 0 |
Form of consideration, other | [3],[7] |  |  | 1,900,000 |
Investment allocation, land | [7] |  |  | 1,900,000 |
Investment allocation, building | [7] |  |  | 0 |
Investment allocation, intangible assets | [7] |  |  | $ 0 |
Interest in joint venture (in hundredths) | [7] |  |  | 58.60% |
JV Partner Contributions | [7] |  |  | $ 1,900,000 |
Unimproved Land [Member] | Legends at Heritage Place - Sartell, MN [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | Oct. 31, 2013 |
Total acquisition costs |  |  |  | $ 537,000 |
Form of consideration, cash |  |  |  | 537,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 537,000 |
Investment allocation, building |  |  |  | 0 |
Investment allocation, intangible assets |  |  |  | $ 0 |
Unimproved Land [Member] | Spring Creek Fruitland - Fruitland, IA [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | Jan. 21, 2014 |
Total acquisition costs |  |  |  | $ 335,000 |
Form of consideration, cash |  |  |  | 335,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 335,000 |
Investment allocation, building |  |  |  | 0 |
Investment allocation, intangible assets |  |  |  | $ 0 |
Unimproved Land [Member] | Isanti Unimproved - Isanti, MN [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | Feb. 04, 2014 |
Total acquisition costs |  |  |  | $ 50,000 |
Form of consideration, cash |  |  |  | 50,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 50,000 |
Investment allocation, building |  |  |  | 0 |
Investment allocation, intangible assets |  |  |  | $ 0 |
Unimproved Land [Member] | Rapid City Unimproved- Rapid City, SD [Member] |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Date acquired |  |  |  | Mar. 25, 2014 |
Total acquisition costs |  |  |  | $ 1,366,000 |
Form of consideration, cash |  |  |  | 1,366,000 |
Form of consideration, units | [1] |  |  | 0 |
Form of consideration, other | [3] |  |  | 0 |
Investment allocation, land |  |  |  | 1,366,000 |
Investment allocation, building |  |  |  | 0 |
Investment allocation, intangible assets |  |  |  | $ 0 |
[1] | Value of limited partnership units of the Operating Partnership at the acquisition date.
[2] | Consists of assumed debt (Homestead Garden I - $9.9 million, Silver Springs - $2.3 million) and value of land contributed by the joint venture partner (71 France - $4.7 million).
[3] | Consists of value of land contributed by the joint venture partner.
[4] | At acquisition the Company adjusted the assumed debt to fair value and recognized approximately $852,000 of goodwill.
[5] | At acquisition, the purchase price included assets in development (land: $804,000, building: $7.8 million, escrow $1.3 million).
[6] | Land was contributed to a joint venture in which the Company has an approximately 52.6% interest. The joint venture is consolidated in IRETs financial statements.
[7] | Land is owned by a joint venture in which the Company has an approximately 58.6% interest. The joint venture is consolidated in IRETs financial statements

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- Definition Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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