Impairment of Real Estate, Impairment of Unconsolidated Entities and Write-Off of Abandoned Development Projects(Detail Textuals) (USD $)	3 Months Ended
Apr. 30, 2013	Apr. 30, 2012
Impairment of real estate impairment of unconsolidated entities and write off of abandoned development projects [Line Items]
Impairment of real estate	$ 0
Impairment of real estate on discontinued operations	0	845,000
Impairment of unconsolidated entities	0	0
Write-off of abandoned development projects	81,000	447,000
Portgage, MI triple net lease retail property [Member]
Impairment of real estate impairment of unconsolidated entities and write off of abandoned development projects [Line Items]
Impairment of real estate on discontinued operations		$ 1,381,000

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 26

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_ImpairmentOfRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration