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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net loss | $ (81,723,002) | $ (91,940,882) | $ (58,725,412)
Net loss attributable to non-controlling interests |  |  | 95,222
NET LOSS ATTRIBUTABLE TO ARROWHEAD | (81,723,002) | (91,940,882) | (58,630,190)
(Gain) loss on disposal of fixed assets |  | (19,195) | 58,878
Change in value of derivatives | 301,022 | (2,869,267) | 6,033,659
Contingent consideration - fair value adjustments | (5,862,464) | 1,891,533 | 2,375,658
Noncash impairment expense | 2,050,817 |  | 2,172,387
Acquired in-process research and development |  | 10,142,786 |
Stock-based compensation | 11,595,816 | 10,232,897 | 5,696,173
Depreciation and amortization | 3,260,045 | 2,336,207 | 1,345,655
Amortization of note premiums | 231,902 | 1,110,524 | 793,887
Gain on debt extinguishment |  |  | (84,721)
Noncash gain on equity investment |  |  | (87,197)
Non-controlling interest |  |  | (95,222)
Changes in operating assets and liabilities: |  |  |
Accounts receivable | (75,000) |  | 75,000
Prepaid expenses and Other Current Assets | (1,020,734) | (3,485,421) | (54,966)
Deferred revenue | 5,000,000 |  |
Accounts payable | 2,554,802 | 2,497,804 | 1,412,275
Accrued expenses | (871,833) | 4,435,784 | 3,478,094
Other | 131,143 | (40,385) | 94,257
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES | (64,427,486) | (65,707,615) | (35,416,373)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Purchases of property and equipment | (3,860,237) | (1,970,612) | (1,717,362)
Proceeds from sale of fixed assets |  | 500 | 10,000
Purchase of marketable securities |  |  | (46,365,528)
Proceeds from sale of marketable securities | 17,308,000 | 26,090,950 | 11,591,120
Cash paid for acquisitions |  | (10,000,000) |
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES | 13,447,763 | 14,120,838 | (36,481,770)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Principal payments on capital leases and notes payable | (217,549) | (213,991) | (225,406)
Payments of taxes for net share settled restricted stock unit issuances | (634,187) |  |
Proceeds from the issuance of common stock | 52,231,433 |  | 172,641,671
Proceeds from the exercise of warrants and stock options | 3,752,120 | 504,512 | 12,878,044
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES | 55,131,817 | 290,521 | 185,294,309
NET INCREASE (DECREASE) IN CASH | 4,152,094 | (51,296,256) | 113,396,166
CASH AT BEGINNING OF PERIOD | 81,214,354 | 132,510,610 | 19,114,444
CASH AT END OF PERIOD | 85,366,448 | 81,214,354 | 132,510,610
Supplementary disclosures: |  |  |
Interest paid | (11,287) | (14,429) | (25,635)
Property and Equipment purchased through tenant improvement allowance financing | (4,849,360) |  |
Property and Equipment expenditures included in accounts payable and accrued expenses | (4,801,930) |  |
Income Tax Credits Refunded | 1,365,288 |  |
Income Taxes Paid | $ (2,400) | (2,400) | (5,862)
Galloway Limited |  |  |
Supplementary disclosures: |  |  |
Common stock issued to Galloway Limited in settlement of services agreement |  |  | $ (500,000)
Novartis |  |  |
Supplementary disclosures: |  |  |
Common Stock issued to Novartis for asset acquisition |  | $ (25,000,000) |

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- Definition Aggregate cash payments for a combination of transactions that are classified as investing activities in which assets, which may include securities, other types of investments, or productive assets, are purchased from third-party sellers. This element can be used by entities to aggregate payments for all asset purchases that are classified as investing activities. + References No definition available. + Details
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- Definition Cash outflow for purchase of trading, available-for-sale securities and held-to-maturity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=65897068&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=65897068&loc=SL4591551-111686 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4573702-111684 + Details
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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition The amount of the write-off for research and development assets that were acquired in a transaction other than a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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