Consolidated Balance Sheets (USD $)	Jun. 30, 2013	Sep. 30, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 29,025,930	$ 3,377,288
Trade receivable		9,375
Other receivables	267,560	9,930
Prepaid expenses and other current assets	1,059,503	618,130
Short term investments	4,058,003	106,500
Note receivable, net		2,446,113
TOTAL CURRENT ASSETS	34,410,996	6,567,336
PROPERTY AND EQUIPMENT
Computers, office equipment and furniture	323,376	323,376
Research equipment	3,346,789	3,319,027
Software	69,623	69,623
Leasehold improvements	2,749,409	2,749,409
Property, Plant and Equipment, Gross, Total	6,489,197	6,461,435
Less: Accumulated depreciation and amortization	(2,695,886)	(1,565,783)
PROPERTY AND EQUIPMENT, NET	3,793,311	4,895,652
OTHER ASSETS
Patents and other intangible assets, net	3,254,177	4,784,569
Derivative asset and other non-current assets	30,011	280,261
TOTAL OTHER ASSETS	3,284,188	5,064,830
TOTAL ASSETS	41,488,495	16,527,818
CURRENT LIABILITIES
Accounts payable	1,061,944	877,986
Accrued expenses	706,092	730,775
Accrued payroll and benefits	811,046	1,127,219
Deferred revenue	71,875	37,500
Derivative liabilities	2,335,163	647,213
Capital lease obligation	219,690	214,801
Notes payable	925,649	100,000
Other current liabilities	546,407	1,592,394
TOTAL CURRENT LIABILITIES	6,677,866	5,327,888
LONG-TERM LIABILITIES
Notes payable, net of current portion	50,000	839,421
Capital lease obligation, net of current portion	1,117,074	1,282,458
Other non-current liabilities	337,587	269,142
TOTAL LONG-TERM LIABILITIES	1,504,661	2,391,021
Commitments and contingencies
STOCKHOLDERS’ EQUITY
Preferred stock, $0.001 par value; 5,000,000 shares authorized; 9,900 shares issued and outstanding	10
Common stock, $0.001 par value; 145,000,000 shares authorized; 31,306,318 and 13,579,185 shares issued and outstanding as of June 30, 2013 and September 30, 2012, respectively	123,665	108,354
Additional paid-in capital	187,282,079	145,917,968
Subscription receivable		(1,016,000)
Accumulated deficit during the development stage	(152,448,785)	(134,997,680)
Total Arrowhead Research Corporation stockholders' equity	34,956,969	10,012,642
Noncontrolling interest	(1,651,001)	(1,203,733)
TOTAL STOCKHOLDERS’ EQUITY	33,305,968	8,808,909
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 41,488,495	$ 16,527,818