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Stock-Based Compensation (Details Textual) (USD $) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 110 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Mar. 31, 2012 | Jun. 30, 2012 | Jun. 30, 2011 | Sep. 30, 2011 | Jun. 30, 2012 | Sep. 30, 2010
Stock-Based Compensation (Textual) [Abstract] |  |  |  |  |  |  |  |
Options granted and outstanding to purchase | 1,606,094 |  |  | 1,606,094 |  | 729,096 | 1,606,094 | 812,334
Options granted |  |  |  | 924,500 | 0 | 20,000 |  |
Stock-based compensation expense |  |  |  | $ 837,188 | $ 1,078,951 |  |  |
Stock-based compensation expense in discontinued operations |  |  |  | 0 | 27,519 |  |  |
Provision for income taxes |  |  | 0 |  |  |  |  |
Fair value of the options granted |  |  |  | 3,505,912 | 62,964 |  |  |
Intrinsic value of the options exercised |  |  |  | 0 |  |  |  |
Stock options exercised |  |  |  | (4,583) | 0 | (2,699) |  |
Weighted average period to recognize pre-tax compensation expense |  |  |  | 3 years 2 months 12 days |  | 2 years 8 months 12 days |  |
Calando Pharmaceuticals, Inc [Member] |  |  |  |  |  |  |  |
Stock-Based Compensation (Textual) [Abstract] |  |  |  |  |  |  |  |
Options granted |  |  |  |  | 0 |  |  |
Fair value of the options granted |  |  |  | 33,690 |  |  |  |
Pre-tax compensation expense | 72,876 |  |  | 72,876 |  |  | 72,876 |
Arrowhead [Member] |  |  |  |  |  |  |  |
Stock-Based Compensation (Textual) [Abstract] |  |  |  |  |  |  |  |
Pre-tax compensation expense | $ 3,547,601 |  |  | $ 3,547,601 |  |  | $ 3,547,601 |
2000 Stock Option Plan [Member] |  |  |  |  |  |  |  |
Stock-Based Compensation (Textual) [Abstract] |  |  |  |  |  |  |  |
Share reserve for issuance | 153,200 |  |  | 153,200 |  | 0 | 153,200 |
Options granted and outstanding to purchase | 153,200 |  |  | 153,200 |  |  | 153,200 |
2004 Equity Incentive Plan [Member] |  |  |  |  |  |  |  |
Stock-Based Compensation (Textual) [Abstract] |  |  |  |  |  |  |  |
Share reserve for issuance | 1,965,860 |  |  | 1,965,860 |  |  | 1,965,860 |
Options granted and outstanding to purchase | 1,201,694 |  |  | 1,201,694 |  |  | 1,201,694 |
Options granted |  |  |  | 660,000 |  |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 + Details
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