Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Sep. 30, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 59,713,424	$ 19,114,444
Trade receivable	75,000	75,000
Other receivables	20,488	8,663
Prepaid expenses and other current assets	689,954	615,351
Short term investments	15,912,757	9,030,261
TOTAL CURRENT ASSETS	76,411,623	28,843,719
PROPERTY AND EQUIPMENT
Computers, office equipment and furniture	323,376	323,376
Research equipment	3,319,429	3,452,013
Software	69,623	69,623
Leasehold improvements	2,749,409	2,749,409
Property, Plant and Equipment, Gross, Total	6,461,837	6,594,421
Less: Accumulated depreciation and amortization	(3,275,690)	(3,081,186)
PROPERTY AND EQUIPMENT, NET	3,186,147	3,513,235
OTHER ASSETS
Patents and other intangible assets, net	3,226,850	3,240,513
Investments	9,867,857	1,732,164
TOTAL OTHER ASSETS	13,094,707	4,972,677
TOTAL ASSETS	92,692,477	37,329,631
CURRENT LIABILITIES
Accounts payable	589,348	1,199,632
Accrued expenses	684,520	638,884
Accrued payroll and benefits	678,035	905,771
Deferred revenue	109,375	103,125
Derivative liabilities	5,097,442	4,096,363
Capital lease obligation	221,345	221,345
Notes payable	1,050,000	971,557
Other current liabilities	588,343	588,343
TOTAL CURRENT LIABILITIES	9,018,408	8,725,020
LONG-TERM LIABILITIES
Notes payable, net of current portion		50,000
Capital lease obligation, net of current portion	1,006,398	1,061,113
Other non-current liabilities	1,757,384	1,758,709
TOTAL LONG-TERM LIABILITIES	2,763,782	2,869,822
Commitments and contingencies
STOCKHOLDERS’ EQUITY
Preferred stock, $0.001 par value; 5,000,000 shares authorized; 51,291 and 9,900 shares issued and outstanding as of December 31, 2013 and September 30, 2013, respectively	51	10
Common stock, $0.001 par value; 145,000,000 shares authorized; 39,002,152 and 32,489,444 shares issued and outstanding as of December 31, 2013 and September 30, 2013, respectively	131,372	124,859
Additional paid-in capital	259,369,442	193,514,766
Accumulated deficit during the development stage	(176,769,281)	(166,140,969)
Total Arrowhead Research Corporation stockholders' equity	82,731,584	27,498,666
Noncontrolling interest	(1,821,297)	(1,763,877)
TOTAL STOCKHOLDERS’ EQUITY	80,910,287	25,734,789
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 92,692,477	$ 37,329,631