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Goodwill and other Identifiable Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Amortizable Identifiable Intangible Assets | Amortizable identifiable intangible assets, net as of September 30, 2015 and 2014 are comprised of the following (in thousands):
| September 30, 2015 |  | September 30, 2014
| Gross carrying amount |  | Accum. amort. |  | Net |  | Gross carrying amount |  | Accum. amort. |  | Net
Purchased and core technology | $ | 45,449 |  |  | $ | (45,424 | ) |  | $ | 25 |  |  | $ | 45,952 |  |  | $ | (45,162 | ) |  | $ | 790 |
License agreements | 18 |  |  | (4 | ) |  | 14 |  |  | 2,440 |  |  | (2,440 | ) |  | — |
Patents and trademarks | 11,817 |  |  | (10,568 | ) |  | 1,249 |  |  | 11,667 |  |  | (9,799 | ) |  | 1,868 |
Customer relationships | 18,490 |  |  | (16,057 | ) |  | 2,433 |  |  | 18,894 |  |  | (15,445 | ) |  | 3,449 |
Non-compete agreements | 1,100 |  |  | (642 | ) |  | 458 |  |  | 1,100 |  |  | (422 | ) |  | 678 |
Order backlog | — |  |  | — |  |  | — |  |  | 360 |  |  | (360 | ) |  | — |
Total | $ | 76,874 |  |  | $ | (72,695 | ) |  | $ | 4,179 |  |  | $ | 80,413 |  |  | $ | (73,628 | ) |  | $ | 6,785 |
Schedule of Amortization Expense | Amortization expense for fiscal years 2015, 2014 and 2013 is as follows (in thousands):
Fiscal year | Total
2015 | $ | 2,910 |
2014 | $ | 3,589 |
2013 | $ | 4,416 |
Schedule of Estimated Future Amortization Expense Related to Identifiable Intangible Assets | Estimated amortization expense for the next five years is as follows (in thousands):
Fiscal year | Total
2016 | $ | 1,944 |
2017 | $ | 1,061 |
2018 | $ | 487 |
2019 | $ | 451 |
2020 | $ | 168 |
Schedule of Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill were (in thousands):
| Fiscal years ended September 30,
| 2015 |  | 2014
Beginning balance, October 1 | $ | 103,398 |  |  | $ | 103,569 |
Foreign currency translation adjustment | (1,301 | ) |  | (171 | )
Ending balance, September 30 | $ | 102,097 |  |  | $ | 103,398 |

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