Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement Consolidated Statements Of Operations [Line Items]
REVENUE	$ 43,750	$ 43,750	$ 131,250	$ 246,516
OPERATING EXPENSES
Salaries and payroll-related costs	2,454,449	1,651,729	7,634,142	5,006,328
General and administrative expenses	1,582,465	899,633	3,865,845	2,597,279
Research and development	6,392,200	1,756,527	14,719,739	5,458,212
Stock-based compensation	2,038,682	363,593	3,758,264	1,114,375
Depreciation and amortization	276,054	454,086	1,075,238	1,352,448
Impairment expense		1,308,047		1,308,047
TOTAL OPERATING EXPENSES	12,743,850	6,433,615	31,053,228	16,836,689
OPERATING LOSS	(12,700,100)	(6,389,865)	(30,921,978)	(16,590,173)
OTHER INCOME (EXPENSE)
Equity in income (loss) of unconsolidated affiliates	78,702	(159,530)	(69,350)	(380,699)
Gain (loss) on sale of fixed assets, net		(39,949)	(58,878)	(76,388)
Interest income (expense), net	226,424	(48,252)	386,392	(68,403)
Change in value of derivatives	758,469	200,747	(5,712,335)	215,620
Other income (expense)	10,054	259,221	81,269	(997,976)
TOTAL OTHER INCOME (EXPENSE)	1,073,649	212,237	(5,372,902)	(1,307,846)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(11,626,451)	(6,177,628)	(36,294,880)	(17,898,019)
Provision for income taxes
LOSS FROM CONTINUING OPERATIONS	(11,626,451)	(6,177,628)	(36,294,880)	(17,898,019)
NET INCOME (LOSS) FROM DISCONTINUED OPERATIONS				(354)
NET LOSS	(11,626,451)	(6,177,628)	(36,294,880)	(17,898,373)
Net (gain) loss attributable to non-controlling interests	(2,468)	98,618	95,132	447,268
NET LOSS ATTRIBUTABLE TO ARROWHEAD	$ (11,628,919)	$ (6,079,010)	$ (36,199,748)	$ (17,451,105)
NET LOSS PER SHARE ATTRIBUTABLE TO ARROWHEAD	$ (0.22)	$ (0.23)	$ (0.81)	$ (0.92)
SHAREHOLDERS - BASIC & DILUTED:
Weighted average shares outstanding - basic and diluted	51,931,989	26,134,183	44,565,008	18,893,197