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Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Revenues | $ 34,939 | $ 50,585 | $ 184,463 | $ 151,461
Cost of revenues: |  |  |  |
Inventor royalties | 5,032 | 15,592 | 22,199 | 37,269
Contingent legal fees | 8,833 | 12,328 | 19,188 | 34,734
Litigation and licensing expenses - patents | 5,973 | 3,501 | 14,622 | 10,800
Amortization of patents | 10,412 | 1,946 | 20,931 | 8,318
Verdict insurance proceeds | 0 | (12,451) | 0 | (12,451)
Verdict insurance proceeds related costs | 0 | 7,661 | 0 | 7,661
Marketing, general and administrative expenses (including non-cash stock compensation expense of $6,285 and $17,375 for the three and nine months ended September 30, 2012, respectively, and $3,568 and $9,891 for the three and nine months ended September 30, 2011, respectively) | 11,914 | 8,748 | 37,548 | 27,031
Research, consulting and other expenses - business development | 1,139 | 850 | 4,222 | 2,893
Total operating costs and expenses | 43,303 | 38,175 | 118,710 | 116,255
Operating income (loss) | (8,364) | 12,410 | 65,753 | 35,206
Interest and investment income | (41) | 25 | 117 | 78
Income (loss) from operations before benefit from (provision for) income taxes | (8,405) | 12,435 | 65,870 | 35,284
Benefit from (provision for) income taxes | 1,938 | (1,889) | (16,303) | (9,343)
Net income (loss) including noncontrolling interests in operating subsidiaries | (6,467) | 10,546 | 49,567 | 25,941
Net (income) loss attributable to noncontrolling interests in operating subsidiaries | (152) | 257 | 63 | (646)
Net income (loss) attributable to Acacia Research Corporation | $ (6,619) | $ 10,803 | $ 49,630 | $ 25,295
Net income (loss) per common share attributable to Acacia Research Corporation: |  |  |  |
Basic earnings (loss) per share | $ (0.14) | $ 0.26 | $ 1.06 | $ 0.65
Diluted earnings (loss) per share | $ (0.14) | $ 0.25 | $ 1.04 | $ 0.62
Weighted average number of shares outstanding, basic | 48,332,878 | 41,292,819 | 46,886,820 | 39,178,952
Weighted average number of shares outstanding, diluted | 48,332,878 | 42,857,880 | 47,795,819 | 40,733,813

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