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Consolidated Statements Of Operations (USD $) | 12 Months Ended | 101 Months Ended
--- | --- | ---
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011
Consolidated Statements Of Operations [Abstract] |  |  |
REVENUE | $ 296,139 |  | $ 3,991,959
OPERATING EXPENSES |  |  |
Salaries | 1,408,366 | 1,146,394 | 19,977,209
General and administrative expenses | 3,821,550 | 2,490,725 | 25,590,815
Research and development | 3,277,760 | 529,601 | 40,428,729
Stock-based compensation | 1,376,921 | 1,424,293 | 12,340,064
Patent amortization | 241,808 | 241,808 | 1,781,944
TOTAL OPERATING EXPENSES | 10,126,405 | 5,832,821 | 100,118,761
OPERATING LOSS | (9,830,266) | (5,832,821) | (96,126,802)
OTHER INCOME (EXPENSE) |  |  |
Loss on equity of investments - Nanotope | (163,180) | (219,540) | (723,253)
Gain on sale of stock in subsidiary |  |  | 2,292,800
Gain/(loss) on sale of fixed assets, net |  | 1,772 | (127,088)
Realized and unrealized gain (loss) on marketable securities | (261,219) |  | 121,045
Interest income (expense), net | 86,530 | (22,783) | 2,714,478
Change in value of derivatives | 1,133,127 | 1,761,385 | 2,894,512
Other income | 250,000 |  | 250,000
TOTAL OTHER INCOME (EXPENSE) | 1,045,258 | 1,520,834 | 7,422,494
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES | (8,785,008) | (4,311,987) | (88,704,308)
Provision for income taxes |  |  |
LOSS FROM CONTINUING OPERATIONS | (8,785,008) | (4,311,987) | (88,704,308)
Income (loss) from discontinued operations | 1,373,396 | (2,645,051) | (47,546,562)
Gain on disposal of discontinued operations | 3,919,213 |  | 4,708,588
NET INCOME (LOSS) FROM DISCONTINUED OPERATIONS | 5,292,609 | (2,645,051) | (42,837,974)
NET LOSS | (3,492,399) | (6,957,038) | (131,542,282)
Net (income) loss attributable to noncontrolling interests | 363,514 | 1,182,990 | 17,834,490
NET LOSS ATTRIBUTABLE TO ARROWHEAD | $ (3,128,885) | $ (5,774,048) | $ (113,707,792)
Earnings per share - basic: |  |  |
Income (loss) from continuing operations attributable to Arrowhead common shareholders | $ (1.18) | $ (0.49) |
Income (loss) from discontinued operations attributable to Arrowhead common shareholders | $ 0.74 | $ (0.41) |
Net loss attributable to Arrowhead shareholders | $ (0.44) | $ (0.90) |
Weighted average shares outstanding | 7,181,121 | 6,434,245 |
Earnings per share - diluted: |  |  |
Income (loss) from continuing operations attributable to Arrowhead common shareholders | $ (1.08) | $ (0.49) |
Income (loss) from discontinued operations attributable to Arrowhead common shareholders | $ 0.68 | $ (0.41) |
Net loss attributable to Arrowhead shareholders | $ (0.40) | $ (0.90) |
Weighted average shares outstanding | 7,830,407 | 6,434,245 |

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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 5 -Section 03 -Paragraph 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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