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Deferred Revenue (Details Textual) (USD $) | 12 Months Ended |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Jul. 31, 2004 | Sep. 30, 2011 Ann Arbor, Mi [Member] | Jul. 31, 2004 Ann Arbor, Mi [Member] | Jul. 31, 2004 Corporate Joint Venture [Member]
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |
Deferred Revenue | $ 1,467,403 | $ 1,930,783 |  |  | $ 9,800,000 | $ 4,000,000
Deferred Revenue, Revenue Recognized |  |  |  | 5,700,000 |  |
Deferred Revenue Recognition Period | 3 years 2 months 12 days |  |  |  |  |
Real Estate Investments, Joint Ventures |  |  | $ 4,000,000 |  | $ 9,800,000 |

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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 + Details
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- Definition Amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
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- Definition The book value of investments in real estate joint ventures including direct and indirect 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 + Details
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