Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Sep. 30, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 19,114,444	$ 3,377,288
Trade receivable	75,000	9,375
Other receivables	8,663	9,930
Prepaid expenses and other current assets	615,351	618,130
Short term investments	9,030,261	106,500
Note receivable, net		2,446,113
TOTAL CURRENT ASSETS	28,843,719	6,567,336
PROPERTY AND EQUIPMENT
Computers, office equipment and furniture	323,376	323,376
Research equipment	3,452,013	3,319,027
Software	69,623	69,623
Leasehold improvements	2,749,409	2,749,409
Property, Plant and Equipment, Gross, Total	6,594,421	6,461,435
Less: Accumulated depreciation and amortization	(3,081,186)	(1,565,783)
PROPERTY AND EQUIPMENT, NET	3,513,235	4,895,652
OTHER ASSETS
Patents and other intangible assets, net	3,240,513	4,784,569
Derivative asset and other non-current assets	1,732,164	280,261
TOTAL OTHER ASSETS	4,972,677	5,064,830
TOTAL ASSETS	37,329,631	16,527,818
CURRENT LIABILITIES
Accounts payable	1,199,632	877,986
Accrued expenses	638,884	730,775
Accrued salaries and payroll-related expenses	905,771	1,127,219
Deferred revenue	103,125	37,500
Derivative liabilities	4,096,363	647,213
Capital lease obligation	221,345	214,801
Notes payable	971,557	100,000
Other current liabilities	588,343	1,592,394
TOTAL CURRENT LIABILITIES	8,725,020	5,327,888
LONG-TERM LIABILITIES
Notes payable, net of current portion	50,000	839,421
Capital lease obligation, net of current portion	1,061,113	1,282,458
Other non-current liabilities	1,758,709	269,142
TOTAL LONG-TERM LIABILITIES	2,869,822	2,391,021
Commitments and contingencies
STOCKHOLDERS’ EQUITY
Preferred stock, $0.001 par value; 5,000,000 shares authorized; 9,900 and 0 shares issued and outstanding as of September 30, 2013 and 2012, respectively	10
Common stock, $0.001 par value; 145,000,000 shares authorized; 32,489,444 and 13,579,185 shares issued and outstanding as of September 30, 2013 and 2012, respectively	124,859	108,354
Additional paid-in capital	193,514,766	145,917,968
Subscription receivable		(1,016,000)
Accumulated deficit during the development stage	(166,140,969)	(134,997,680)
Total Arrowhead Research Corporation stockholders' equity	27,498,666	10,012,642
Noncontrolling interest	(1,763,877)	(1,203,733)
TOTAL STOCKHOLDERS’ EQUITY	25,734,789	8,808,909
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 37,329,631	$ 16,527,818