Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	May 21, 2025	Dec. 31, 2024	Feb. 18, 2021
Subsidiary or Equity Method Investee [Line Items]
Share-Based Payment Arrangement, Expense	$ 3,000	$ 3,000	$ 4,900	$ 4,100
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 16,100		$ 16,100
Stock issued to directors, shares (in shares)	179,836	145,687	179,836	145,687
Stock-based compensation			$ 4,923	$ 4,146
Common stock issued to directors	$ 1,034	$ 770	$ 1,034	$ 770
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 7 months 6 days
Stock Issued During Period Shares Compensation To Interim CEO		10,831		10,831
Common stock issued as compensation to interim CEO		$ 55		$ 55
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)			151,976	277,966
Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 900	$ 1,200
Shares Withheld for Tax Withholding Obligation, Price Per Share (in dollars per share)	$ 5.82	$ 4.31	$ 5.82	$ 4.31
Common stock, shares authorized (in shares)	1,250,000,000		1,250,000,000			1,250,000,000
Dividend per share	$ 0.00375		$ 0.00375
Maximum [Member]
Subsidiary or Equity Method Investee [Line Items]
Common stock, shares authorized (in shares)					1,250,000,000
Minimum [Member]
Subsidiary or Equity Method Investee [Line Items]
Common stock, shares authorized (in shares)					750,000,000
At the market Offering [Member]
Subsidiary or Equity Method Investee [Line Items]
Equity Distribution Agreement, Maximum Number of Shares to be Sold (in shares)	29,008,536		29,008,536				60,000,000
At the market Offering [Member] | At The Market Equity Distribution Agreement [Member]
Subsidiary or Equity Method Investee [Line Items]
Proceeds from Issuance or Sale of Equity			$ 174,100
Payments of Stock Issuance Costs			$ 2,700