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Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
Revenue: |  |  |
Royalties and license fees | $ 27,445 | $ 30,385 | $ 33,843
Product sales | 20,742 | 20,150 | 17,364
Research and development | 3,741 | 2,221 | 3,281
Total revenue | 51,928 | 52,756 | 54,488
Operating costs and expenses: |  |  |
Product costs | 7,418 | 6,750 | 6,806
Research and development | 14,143 | 14,005 | 18,972
Selling, general and administrative | 14,025 | 14,862 | 12,509
Restructuring charges | 0 | 1,616 | 1,204
Asset impairment charges |  |  | 3,006
Total operating costs and expenses | 35,586 | 37,233 | 42,497
Operating income from continuing operations | 16,342 | 15,523 | 11,991
Other (loss) income: |  |  |
Investment income, net | 540 | 627 | 1,022
Impairment loss on investments | (804) |  | (7,943)
Other income, net | 228 | 379 | 314
Other (loss) income | (36) | 1,006 | (6,607)
Income from continuing operations before income taxes | 16,306 | 16,529 | 5,384
Income tax provision | (6,177) | (5,604) | (4,979)
Income from continuing operations | 10,129 | 10,925 | 405
Discontinued operations: |  |  |
Income (loss) from discontinued operations, net of income taxes | 1,176 | (29,431) | (21,494)
Loss on sale of discontinued operations, net of income taxes | (1,074) |  |
Income (loss) from discontinued operations | 102 | (29,431) | (21,494)
Net income (loss) | $ 10,231 | $ (18,506) | $ (21,089)
Basic income (loss) per share: |  |  |
Continuing operations | $ 0.58 | $ 0.63 | $ 0.02
Discontinued operations | $ 0.01 | $ (1.69) | $ (1.24)
Net income (loss) | $ 0.59 | $ (1.06) | $ (1.21)
Diluted income (loss) per share: |  |  |
Continuing operations | $ 0.58 | $ 0.63 | $ 0.02
Discontinued operations | $ 0.01 | $ (1.69) | $ (1.24)
Net income (loss) | $ 0.59 | $ (1.06) | $ (1.21)
Weighted average number of shares outstanding: |  |  |
Basic | 17,318 | 17,419 | 17,372
Diluted | 17,431 | 17,462 | 17,380

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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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