Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Sep. 30, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 142,847,860	$ 19,114,444
Trade receivable		75,000
Prepaid expenses	643,023	532,354
Other current assets	633,807	91,660
Short term investments	17,798,475	9,030,261
TOTAL CURRENT ASSETS	161,923,165	28,843,719
Property and equipment, net	3,290,270	3,513,235
Intangible assets, net	3,213,186	3,240,513
Investments	34,048,359	1,702,153
Other assets	166,414	30,011
TOTAL ASSETS	202,641,394	37,329,631
CURRENT LIABILITIES
Accounts payable	2,511,572	1,199,632
Accrued expenses	913,856	638,884
Accrued payroll and benefits	732,131	905,771
Deferred revenue	65,625	103,125
Derivative liabilities	4,936,530	4,096,363
Capital lease obligation	212,234	221,345
Notes payable	1,050,000	971,557
Other current liabilities	60,592	588,343
TOTAL CURRENT LIABILITIES	10,482,540	8,725,020
LONG-TERM LIABILITIES
Notes payable, net of current portion		50,000
Capital lease obligation, net of current portion	865,777	1,061,113
Other non-current liabilities	1,755,520	1,758,709
TOTAL LONG-TERM LIABILITIES	2,621,297	2,869,822
Commitments and contingencies
STOCKHOLDERS’ EQUITY
Preferred stock, $0.001 par value; 5,000,000 shares authorized; 21,291 and 9,900 shares issued and outstanding as of March 31, 2014 and September 30, 2013, respectively	21	10
Common stock, $0.001 par value; 145,000,000 shares authorized; 51,867,071 and 32,489,444 shares issued and outstanding as of March 31, 2014 and September 30, 2013, respectively	144,237	124,859
Additional paid-in capital	381,966,576	193,514,766
Accumulated deficit during the development stage	(190,711,800)	(166,140,969)
Total Arrowhead Research Corporation stockholders' equity	191,399,034	27,498,666
Noncontrolling interest	(1,861,477)	(1,763,877)
TOTAL STOCKHOLDERS’ EQUITY	189,537,557	25,734,789
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 202,641,394	$ 37,329,631