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Note 5 - Net Income Per Common Unit - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | [2] | Mar. 31, 2023 | [3] | Sep. 30, 2022 | Jun. 30, 2022 | [4] | Mar. 31, 2022 | [4] | Sep. 30, 2023 | Sep. 30, 2022
Net income attributable to common unitholders | $ 42,951 |  |  |  | $ 65,714 |  |  | $ 135,199 | $ 179,119
Weighted average common units—basic (in shares) | 12,635 |  |  |  | 12,506 |  |  | 12,613 | 12,476
Basic net income per common unit (in dollars per share) | $ 3.4 |  |  |  | $ 5.25 |  |  | $ 10.72 | $ 14.36
Plus: dilutive effect of preferred units (in shares) | 1,104 |  |  |  | 6,210 |  |  | 2,434 | 6,210
Plus: dilutive effect of warrants (in shares) | 1,492 |  |  |  | 807 |  |  | 1,296 | 759
Plus: dilutive effect of unvested unit-based awards (in shares) | 240 |  |  |  | 195 |  |  | 190 | 204
Weighted average common units—diluted (in shares) | 15,471 |  |  |  | 19,718 |  |  | 16,533 | 19,649
Net income | $ 63,846 | [1] | $ 70,334 | $ 79,275 | $ 74,555 | $ 66,820 | $ 63,899 | $ 213,455 | $ 205,274
Less: income attributable to preferred unitholders | (786) |  |  |  | 0 |  |  | (2,693) | 0
Less: redemption of preferred units | (17,083) |  |  |  | 0 |  |  | (60,929) | 0
Diluted net income attributable to common unitholders and the general partner | 45,977 |  |  |  | 74,555 |  |  | 149,833 | 205,274
Less: diluted net income attributable to the general partner | (920) |  |  |  | (1,491) |  |  | (2,997) | (4,105)
Diluted net income attributable to common unitholders | $ 45,057 |  |  |  | $ 73,064 |  |  | $ 146,836 | $ 201,169
Diluted net income per common unit (in dollars per share) | $ 2.91 |  |  |  | $ 3.71 |  |  | $ 8.88 | $ 10.24
[1] | Net income includes $2.9 million of income attributable to preferred unitholders that accumulated during the period, of which $2.9 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.
[2] | Net income includes $5.0 million of income attributable to preferred unitholders that accumulated during the period, of which $4.9 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.
[3] | Net income includes $6.7 million of income attributable to preferred unitholders that accumulated during the period, of which $6.5 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.
[4] | Net income includes $7.5 million of income attributable to preferred unitholders that accumulated during the period, of which $7.4 million is allocated to the common unitholders and $0.2 million is allocated to the general partner.

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