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Allowance for Doubtful Accounts (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Allowance for Doubtful Accounts
Balance in allowance for doubtful accounts	$ 0		$ 0		$ 0
Bad debt expense	$ 0	$ 15,000	$ 0	$ 310,000
Write-off of unbilled rent receivable				362,000
Write-off of unamortized intangible lease assets				67,000
Write off of tenant origination costs				$ 884,000

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- Definition

Represents information pertaining to write-off of tenant origination costs.

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No definition available.

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- Definition

Represents the amount of unamortized intangible lease assets written off during the period.

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- Definition

Represents the amount of unbilled rent receivable written off during the period.

+ References

No definition available.

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- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130534-203044

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-Publisher FASB
-Name Accounting Standards Codification
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