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Transit Business Park Acquisition - Intangible asset amortization (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013 | Jun. 20, 2013 TransitBusinessPark
In-place leases initial value |  |  |  |  |  |  | $ 806,000
Above market leases initial value |  |  |  |  |  |  | 48,000
Below market leases initial values |  |  |  |  |  |  | 156,000
In-place Leases | 0 | 27,000 | 74,000 | 237,000 | 347,000 | 121,000 |
Above Market Leases | 0 | 11,000 | 11,000 | 11,000 | 12,000 | 3,000 |
Below Market Leases | $ 0 | $ 0 | $ 13,000 | $ 51,000 | $ 68,000 | $ 24,000 |

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- Definition Amount of non-cash amortization of intangible asset (liability) for above and below market leases. + References No definition available. + Details
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- Definition Amount of amortization of acquired leases acquired as part of a real property acquisition at below market lease rate with a finite life. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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