Note 9 - Shareholders' Equity (Details Textual) $ / shares in Units, $ in Thousands		3 Months Ended
	Jun. 30, 2021 USD ($) $ / shares shares	Mar. 31, 2025 USD ($) $ / shares shares	Mar. 31, 2024 USD ($)	Jun. 30, 2026 $ / shares	Dec. 31, 2024 $ / shares shares	Jan. 31, 2021 USD ($)	Dec. 31, 2017 USD ($)
Common Stock, Shares Authorized (in shares)		500,000,000			500,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.01			$ 0.01
Common Stock, Shares, Outstanding (in shares)		48,982,638			48,912,293
Proceeds from Issuance of Common Stock | $		$ 11	$ 13
Preferred Stock, Shares Authorized (in shares)		100,000,000			100,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.01			$ 0.01
Preferred Stock, Shares Issued (in shares)		4,800,000			4,800,000
Preferred Stock, Shares Outstanding (in shares)		4,800,000			4,800,000
Long-term Incentive Plan Units [Member] | Unit Distribution [Member]
Distribution Made to Limited Partner, Unit Distribution (in shares)		2,224,905
Series A Redeemable Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)	4,800,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares	$ 0.01
Preferred Stock, Dividend Rate, Percentage	6.625%
Proceeds from Issuance of Preferred Stock and Preference Stock | $	$ 115,900
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares	$ 25
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares	1.65625
Preferred Stock, Convertible, Conversion Ratio		3.701
Preferred Stock, Shares Issued (in shares)		4,800,000
Payments of Dividends | $		$ 2,000
Preferred Stock, Shares Outstanding (in shares)		4,800,000
Series A Redeemable Preferred Stock [Member] | Forecast [Member]
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares				$ 25
Series A Redeemable Preferred Stock [Member] | Scenario, Change of Control [Member]
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares	$ 25
ATM Equity Offering Program [Member]
Equity Offering, Maximum Offering Amount | $		$ 77,500				$ 100,000
Stock Issued During Period, Shares, New Issues (in shares)		0
Dividend Reinvestment and Stock Purchase Plan (DRSPP) [Member]
Equity Offering, Maximum Offering Amount | $		$ 49,900					$ 50,000
Stock Issued During Period, Shares, New Issues (in shares)		1,282
Stock Issued During Period, Weighted Average Price Per Share (in dollars per share) | $ / shares		$ 8.46
Proceeds from Issuance of Common Stock | $		$ 11