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Stockholders' Equity (Narrative) (Details) - USD ($)							3 Months Ended				12 Months Ended
	Mar. 15, 2025	Sep. 25, 2024	Jun. 21, 2024	Mar. 29, 2024	Dec. 14, 2023	Sep. 14, 2023	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2024
Stockholders' Equity Note [Line Items]
Preferred stock, par value per share							$ 0.01				$ 0.01
Series K Preferred Stock [Member]
Stockholders' Equity Note [Line Items]
Preferred stock, par value per share	$ 0.01
Preferred stock, dividend rate	6.00%						6.00%				6.00%
Proceeds from issuance of private placement	$ 520,000
Shares issued	52
Series I Preferred Stock [Member]
Stockholders' Equity Note [Line Items]
Preferred stock, dividend rate								3.00%		3.00%
Series J Preferred Stock [Member]
Stockholders' Equity Note [Line Items]
Preferred stock, par value per share		$ 0.01	$ 0.01	$ 0.01	$ 0.01
Preferred stock, dividend rate							8.00%	8.00%			8.00%
Proceeds from issuance of private placement		$ 1,360,000	$ 670,000	$ 2,690,000	$ 15,270,000
Shares issued		136	67	269	1,527
Series H Preferred Stock [Member]
Stockholders' Equity Note [Line Items]
Preferred stock, dividend rate						3.50%			3.50%	3.50%
Preferred stock redeemed, shares						22			1,101
Preferred stock, redemption price						$ 10,000			$ 10,000
Preferred stock redeemed, value						$ 220,000			$ 11,000,000.0

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

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer.

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