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Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Revenues | $ 50,484 | $ 39,746 | $ 149,524 | $ 100,876
Cost of revenues: |  |  |  |
Inventor royalties | 9,573 | 8,588 | 17,167 | 21,677
Contingent legal fees | 6,607 | 13,039 | 10,355 | 22,406
Litigation and licensing expenses - patents | 5,268 | 3,761 | 8,649 | 7,295
Amortization of patents | 5,393 | 2,600 | 10,519 | 6,372
Marketing, general and administrative expenses (including non-cash stock compensation expense of $6,000 and $11,090 for the three and six months ended June 30, 2012, respectively, and $3,422 and $6,323 for the three and six months ended June 30, 2011, respectively) | 11,903 | 8,302 | 25,634 | 18,287
Research, consulting and other expenses - business development | 1,967 | 1,335 | 3,083 | 2,043
Total operating costs and expenses | 40,711 | 37,625 | 75,407 | 78,080
Operating income | 9,773 | 2,121 | 74,117 | 22,796
Interest and investment income | 102 | 24 | 158 | 53
Income from operations before provision for income taxes | 9,875 | 2,145 | 74,275 | 22,849
Provision for income taxes | (3,494) | (306) | (18,241) | (7,454)
Net income including noncontrolling interests in operating subsidiaries | 6,381 | 1,839 | 56,034 | 15,395
Net (income) loss attributable to noncontrolling interests in operating subsidiaries | (60) | 300 | 215 | (903)
Net income attributable to Acacia Research Corporation | $ 6,321 | $ 2,139 | $ 56,249 | $ 14,492
Net income per common share attributable to Acacia Research Corporation: |  |  |  |
Basic earnings per share | $ 0.13 | $ 0.05 | $ 1.22 | $ 0.38
Diluted earnings per share | $ 0.13 | $ 0.05 | $ 1.19 | $ 0.37
Weighted average number of shares outstanding, basic | 47,944,193 | 40,994,082 | 46,155,846 | 38,104,500
Weighted average number of shares outstanding, diluted | 48,938,766 | 42,453,782 | 47,208,105 | 39,477,616

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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