Consolidated Statements Of Operations (USD $)	3 Months Ended	9 Months Ended	99 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011
Consolidated Statements Of Operations
REVENUE			$ 296,139		$ 3,991,959
OPERATING EXPENSES
Salaries	354,223	81,096	1,087,714	802,122	19,656,556
General and administrative expenses	643,165	736,443	2,097,538	1,796,326	23,866,803
Research and development	365,618	123,343	2,768,130	372,554	39,919,100
Stock-based compensation	346,707	390,227	1,078,951		12,042,095
Patent amortization	60,452	60,452	181,356	181,356	1,721,492
TOTAL OPERATING EXPENSES	1,770,165	1,391,561	7,213,689	4,047,755	97,206,046
OPERATING LOSS	(1,770,165)	(1,391,561)	(6,917,550)	(4,047,755)	(93,214,087)
OTHER INCOME (EXPENSE)
Loss on equity of investments - Nanotope	(70,366)	(66,489)	(96,367)	(165,727)	(656,440)
Gain on sale of stock in subsidiary					2,292,800
Loss on sale of fixed assets, net					(127,088)
Realized and unrealized gain (loss) on marketable securities	(498,406)		(138,486)		243,778
Interest income (expense), net	20,531	(9,814)	70,815	(28,280)	2,698,764
Change in value of derivatives	373,734	1,552,228	1,243,156	1,552,228	3,004,541
TOTAL OTHER INCOME (EXPENSE)	(174,507)	1,475,925	1,079,118	1,358,221	7,456,355
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(1,944,672)	84,364	(5,838,432)	(2,689,534)	(85,757,732)
Provision for income taxes
LOSS FROM CONTINUING OPERATIONS	(1,944,672)	84,364	(5,838,432)	(2,689,534)	(85,757,732)
Income (loss) from discontinued operations	(68,742)	(768,160)	1,373,758	(2,383,288)	(47,546,200)
Gain (loss) on disposal of discontinued operations			3,919,213	430,000	4,708,588
NET INCOME (LOSS) FROM DISCONTINUED OPERATIONS	(68,742)	(768,160)	5,292,971	(1,953,288)	(42,837,612)
NET INCOME (LOSS)	(2,013,414)	(683,796)	(545,461)	(4,642,822)	(128,595,344)
Net (income) loss attributable to noncontrolling interests	193,497	312,741	193,099	872,880	17,664,075
NET INCOME (LOSS) ATTRIBUTABLE TO ARROWHEAD	$ (1,819,917)	$ (371,055)	$ (352,362)	$ (3,769,942)	$ (110,931,269)
Earnings per share - basic:
Income (loss) from continuing operations attributable to Arrowhead common shareholders	$ (0.03)		$ (0.07)	$ (0.03)
Income from discontinued operations attributable to Arrowhead common shareholders		$ (0.01)	$ 0.07	$ (0.03)
Net income (loss) attributable to Arrowhead shareholders	$ (0.03)	$ (0.01)		$ (0.06)
Weighted average shares outstanding	71,826,276	64,579,403	71,804,027	62,056,412
Earnings per share - diluted:
Income (loss) from continuing operations attributable to Arrowhead common shareholders	$ (0.03)		$ (0.07)	$ (0.03)
Income from discontinued operations attributable to Arrowhead common shareholders		$ (0.01)	$ 0.07	$ (0.03)
Net income (loss) attributable to Arrowhead shareholders	$ (0.03)	$ (0.01)		$ (0.06)
Weighted average shares outstanding	71,826,276	64,579,403	78,567,954	62,056,412

Gain (loss) on entity's disposition of equity in securities of subsidiaries. Reflects the difference in the parent company's carrying amount of the equity interest in the subsidiary immediately before and after all stock transactions.

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Gain (loss) after tax expense or benefit, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss).

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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