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Description (Details) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended
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Sep. 30, 2012 | Sep. 30, 2012 OctoPlus N.V.[Member] Subsequent Event [Member] USD ($) | Sep. 30, 2012 OctoPlus N.V.[Member] Subsequent Event [Member] EUR (€) | Sep. 30, 2012 Vessix Vascular, Inc. [Member] Subsequent Event [Member] USD ($)
Description (Textual) [Abstract] |  |  |  |
Common stock offering price |  |  | € 0.52 |
Expected gain on sale of investments |  | $ 0.1 |  | $ 1.2
Proceeds on Sale of Investment at Maturity |  |  |  | $ 5.5
Description (Additional Textual) [Abstract] |  |  |  |
Minimum percentage of research & development revenue to aggregate revenue | 10.00% |  |  |

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