The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The percentage charged for managing real estate properties.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Asset Management Fee

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- Definition

Number Of Real Estate Properties Sold

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- Definition

Variable Interest Entity, Consideration Limited Partnership Interest Unit Price

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Related Party Transactions - Narrative (Details) - Whitestone	1 Months Ended	3 Months Ended
	Dec. 31, 2018 tenant	Mar. 31, 2021	Dec. 08, 2016 USD ($) $ / shares
Related Party Transaction [Line Items]
Number of real estate properties sold \| tenant	3
Property management fee (percentage)		5.00%
Asset management fee (percentage)		0.125%
Uptown Tower
Related Party Transaction [Line Items]
Property management fee (percentage)		3.00%
Asset management fee (percentage)		0.125%
Pillarstone OP
Related Party Transaction [Line Items]
Accrued rents and accounts receivable, net of allowance for doubtful accounts \| $			$ 4,121,312
Ownership percentage			18.60%
Variable Interest Entity
Related Party Transaction [Line Items]
Consideration, limited partnership interest (in dollars per share) \| $ / shares			$ 1.331