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Note 10 - Distributions - Distribution Activity (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 25, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Distributions declared per share (in dollars per share) |  | $ 0.33 | $ 0.33 | $ 1.04 | $ 0.99 | $ 1.37
Dividends, cash |  |  |  | $ 27,827 |  | $ 41,881
Dividends, shares (in shares) |  |  |  | 126,380 |  | 145,743
Dividends, stock |  |  |  | $ 1,451 |  | $ 1,833
O 2025 M2 Dividends [Member] | Forecast [Member] |  |  |  |  |  |
Record date | Feb. 18, 2025 |  |  |  |  |
Payment date | Mar. 14, 2025 |  |  |  |  |
Distributions declared per share (in dollars per share) | $ 0.11 |  |  |  |  |
O 2025 M1 Dividends [Member] | Forecast [Member] |  |  |  |  |  |
Record date | Jan. 16, 2025 |  |  |  |  |
Payment date | Feb. 14, 2025 |  |  |  |  |
Distributions declared per share (in dollars per share) | $ 0.11 |  |  |  |  |
O 2024 M7 1 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Nov. 15, 2024 |  |
Payment date |  |  |  | Dec. 13, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.11 |  |
Dividends, cash |  |  |  | $ 0 |  |
Dividends, shares (in shares) |  |  |  | 0 |  |
Dividends, stock |  |  |  | $ 0 |  |
O 2024 M12 Dividends [Member] | Forecast [Member] |  |  |  |  |  |
Record date | Dec. 16, 2024 |  |  |  |  |
Payment date | Jan. 15, 2025 |  |  |  |  |
Distributions declared per share (in dollars per share) | $ 0.11 |  |  |  |  |
O 2024 M7 2 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Oct. 17, 2024 |  |
Payment date |  |  |  | Nov. 14, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.11 |  |
Dividends, cash |  |  |  | $ 0 |  |
Dividends, shares (in shares) |  |  |  | 0 |  |
Dividends, stock |  |  |  | $ 0 |  |
O 2024 M7 3 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Sep. 16, 2024 |  |
Payment date |  |  |  | Oct. 16, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.11 |  |
Dividends, cash |  |  |  | $ 3,914 |  |
Dividends, shares (in shares) |  |  |  | 18,539 |  |
Dividends, stock |  |  |  | $ 195 |  |
O 2024 M4 1 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Aug. 16, 2024 |  |
Payment date |  |  |  | Sep. 13, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.11 |  |
Dividends, cash |  |  |  | $ 3,818 |  |
Dividends, shares (in shares) |  |  |  | 17,441 |  |
Dividends, stock |  |  |  | $ 192 |  |
O 2024 M4 2 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Jul. 17, 2024 |  |
Payment date |  |  |  | Aug. 15, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.11 |  |
Dividends, cash |  |  |  | $ 3,775 |  |
Dividends, shares (in shares) |  |  |  | 16,852 |  |
Dividends, stock |  |  |  | $ 192 |  |
O 2024 M4 3 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Jun. 17, 2024 |  |
Payment date |  |  |  | Jul. 16, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.11 |  |
Dividends, cash |  |  |  | $ 3,766 |  |
Dividends, shares (in shares) |  |  |  | 15,860 |  |
Dividends, stock |  |  |  | $ 199 |  |
O 2024 M2 1 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Jun. 17, 2024 |  |
Payment date |  |  |  | Jun. 14, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.11 |  |
Dividends, cash |  |  |  | $ 3,701 |  |
Dividends, shares (in shares) |  |  |  | 16,686 |  |
Dividends, stock |  |  |  | $ 201 |  |
O 2024 M2 2 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Apr. 18, 2024 |  |
Payment date |  |  |  | May 15, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.11 |  |
Dividends, cash |  |  |  | $ 3,654 |  |
Dividends, shares (in shares) |  |  |  | 16,687 |  |
Dividends, stock |  |  |  | $ 199 |  |
O 2024 M2 3 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Mar. 19, 2024 |  |
Payment date |  |  |  | Apr. 16, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.05 |  |
Dividends, cash |  |  |  | $ 1,625 |  |
Dividends, shares (in shares) |  |  |  | 7,598 |  |
Dividends, stock |  |  |  | $ 85 |  |
O 2024 M2 4 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  | Mar. 19, 2024 |  |
Payment date |  |  |  | Apr. 16, 2024 |  |
Distributions declared per share (in dollars per share) |  |  |  | $ 0.11 |  |
Dividends, cash |  |  |  | $ 3,574 |  |
Dividends, shares (in shares) |  |  |  | 16,717 |  |
Dividends, stock |  |  |  | $ 188 |  |
O 2023 M10 1 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Feb. 16, 2024
Payment date |  |  |  |  |  | Mar. 15, 2024
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,463
Dividends, shares (in shares) |  |  |  |  |  | 18,257
Dividends, stock |  |  |  |  |  | $ 210
O 2023 M10 2 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Jan. 18, 2024
Payment date |  |  |  |  |  | Feb. 14, 2024
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,462
Dividends, shares (in shares) |  |  |  |  |  | 15,873
Dividends, stock |  |  |  |  |  | $ 210
O 2023 M10 3 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Dec. 19, 2023
Payment date |  |  |  |  |  | Jan. 16, 2024
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,472
Dividends, shares (in shares) |  |  |  |  |  | 14,563
Dividends, stock |  |  |  |  |  | $ 199
O 2023 M10 4 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Nov. 17, 2023
Payment date |  |  |  |  |  | Dec. 15, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.05
Dividends, cash |  |  |  |  |  | $ 1,574
Dividends, shares (in shares) |  |  |  |  |  | 7,137
Dividends, stock |  |  |  |  |  | $ 93
O 2023 M7 1 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Nov. 17, 2023
Payment date |  |  |  |  |  | Dec. 15, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,463
Dividends, shares (in shares) |  |  |  |  |  | 15,701
Dividends, stock |  |  |  |  |  | $ 206
O 2023 M7 2 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Oct. 18, 2023
Payment date |  |  |  |  |  | Nov. 15, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,493
Dividends, shares (in shares) |  |  |  |  |  | 14,022
Dividends, stock |  |  |  |  |  | $ 173
O 2023 M7 3 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Sep. 19, 2023
Payment date |  |  |  |  |  | Oct. 16, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,445
Dividends, shares (in shares) |  |  |  |  |  | 15,067
Dividends, stock |  |  |  |  |  | $ 184
O 2023 M4 1 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Aug. 17, 2023
Payment date |  |  |  |  |  | Sep. 15, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,458
Dividends, shares (in shares) |  |  |  |  |  | 8,665
Dividends, stock |  |  |  |  |  | $ 106
O 2023 M4 2 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Jul. 18, 2023
Payment date |  |  |  |  |  | Aug. 15, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,427
Dividends, shares (in shares) |  |  |  |  |  | 8,307
Dividends, stock |  |  |  |  |  | $ 105
O 2023 M4 3 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Jun. 16, 2023
Payment date |  |  |  |  |  | Jul. 14, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,434
Dividends, shares (in shares) |  |  |  |  |  | 7,424
Dividends, stock |  |  |  |  |  | $ 96
O 2023 M2 1 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | May 18, 2023
Payment date |  |  |  |  |  | Jun. 14, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,087
Dividends, shares (in shares) |  |  |  |  |  | 7,128
Dividends, stock |  |  |  |  |  | $ 86
O 2023 M2 2 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Apr. 18, 2023
Payment date |  |  |  |  |  | May 16, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,068
Dividends, shares (in shares) |  |  |  |  |  | 6,705
Dividends, stock |  |  |  |  |  | $ 84
O 2023 M2 3 Dividends [Member] |  |  |  |  |  |
Record date |  |  |  |  |  | Mar. 17, 2023
Payment date |  |  |  |  |  | Apr. 14, 2023
Distributions declared per share (in dollars per share) |  |  |  |  |  | $ 0.11
Dividends, cash |  |  |  |  |  | $ 3,035
Dividends, shares (in shares) |  |  |  |  |  | 6,894
Dividends, stock |  |  |  |  |  | $ 81

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