Percentage of voting stock

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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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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash.

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Aggregate amount of cumulative preferred dividends in arrears.

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- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.

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- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

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Preferred Stock (Narrative) (Details) - USD ($)			12 Months Ended
Preferred Stock (Narrative) (Details) - USD ($)	Feb. 28, 2017	Mar. 16, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Redemption of common units, shares			53,891
Common Stock [Member]
Class of Stock [Line Items]
Redemption of common units, shares	6,004,957		54,000
Shares issued, price per share	$ 10.40
6.25% Convertible Debt [Member]
Class of Stock [Line Items]
Interest rate		6.25%	6.25%
Principal amount		$ 1,012,000
Real Estate Strategies, L.P. [Member]
Class of Stock [Line Items]
Preferred dividends, cash		$ 1,484,000
Percentage of voting stock		49.00%
Real Estate Strategies, L.P. [Member] \| 6.25% Convertible Debt [Member]
Class of Stock [Line Items]
Interest rate		6.25%
Principal amount		$ 1,012,000
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, annual dividend rate			8.00%
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, annual dividend rate			10.00%
Series D Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, annual dividend rate		6.25%
Preferred dividends, cash					$ 650,000
Preferred stock, shares outstanding						6,245,156
Series D Preferred Stock [Member] \| SREP III Flight Investco L.P. [Member]
Class of Stock [Line Items]
Preferred stock, shares issued		3,000,000
Preferred stock, value		$ 30,000,000
Series D Preferred Stock [Member] \| Real Estate Strategies, L.P. [Member]
Class of Stock [Line Items]
Preferred stock, shares issued		245,156
Redemption of common units, shares		3,000,000
Series A and B Preferred Stock [Member] \| SREP III Flight Investco L.P. [Member]
Class of Stock [Line Items]
Preferred stock, value		$ 20,147,000
Series C Preferred Stock [Member] \| Real Estate Strategies, L.P. [Member]
Class of Stock [Line Items]
Shares converted		3,000,000
Dividends unpaid and accrued		$ 4,947,000
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, annual dividend rate	6.25%		6.25%	6.25%
Preferred stock, value			$ 10,050,000	$ 10,050,000
Redemption of common units, shares	925,000
Preferred dividends, cash			$ 578,000	$ 578,000	$ 483,000
Preferred stock, shares outstanding	925,000		925,000	925,000