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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Revenues: |  |
Total revenues | $ 125,102 | $ 59,223
Costs and expenses: |  |
Cost of revenues - intellectual property operations | 52,829 | 37,388
Engineering and development expenses - industrial operations | 735 | 626
Sales and marketing expenses - industrial operations | 6,908 | 8,621
General and administrative expenses | 43,694 | 52,680
Total costs and expenses | 104,166 | 99,315
Operating income (loss) | 20,936 | (40,092)
Equity securities investments: |  |
Change in fair value of equity securities | 31,423 | (263,695)
(Loss) gain on sale of equity securities | (10,930) | 125,318
Earnings on equity investment in joint venture | 4,167 | 42,531
Net realized and unrealized gain (loss) | 24,660 | (95,846)
Change in fair value of the Series A and B warrants and embedded derivatives | 8,241 | 13,102
Gain (loss) on foreign currency exchange | 53 | (3,324)
Interest expense on Senior Secured Notes | (1,930) | (6,432)
Interest income and other, net | 15,466 | 5,442
Total other income (expense) | 46,490 | (87,058)
Income (loss) before income taxes | 67,426 | (127,150)
Income tax benefit | 1,504 | 16,211
Net income (loss) including noncontrolling interests in subsidiaries | 68,930 | (110,939)
Net income attributable to noncontrolling interests in subsidiaries | (1,870) | (14,126)
Net income (loss) attributable to Acacia Research Corporation | 67,060 | (125,065)
Income (loss) per share: |  |
Net income (loss) attributable to common stockholders - Basic | $ 55,140 | $ (133,035)
Weighted average number of shares outstanding - Basic | 75,296,025 | 42,460,504
Basic net income (loss) per common share (in usd per share) | $ 0.73 | $ (3.13)
Net income (loss) attributable to common stockholders - Diluted | $ 53,208 | $ (133,035)
Weighted average number of shares outstanding - Diluted | 92,411,818 | 42,460,504
Diluted net income (loss) per common share (in usd per share) | $ 0.58 | $ (3.13)
Intellectual property operations |  |
Revenues: |  |
Total revenues | $ 89,156 | $ 19,508
Costs and expenses: |  |
Cost of revenues - intellectual property operations | 34,164 | 18,029
Industrial operations |  |
Revenues: |  |
Total revenues | 35,098 | 39,715
Costs and expenses: |  |
Cost of revenues - intellectual property operations | 18,009 | 19,359
Energy operations |  |
Revenues: |  |
Total revenues | 848 | 0
Costs and expenses: |  |
Cost of revenues - intellectual property operations | $ 656 | $ 0

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