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Short-term Investments (Tables) | 9 Months Ended
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Jun. 30, 2019
Investments Debt And Equity Securities [Abstract] |
Short-term Investments | The Company’s short-term investments were composed of the following (in thousands):
|  | As of September 30, 2018 (in thousands) |
|  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Estimated Fair Value |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 17,851 |  |  | $ | — |  |  | $ | (60 | ) |  | $ | 17,791 |
Government bonds |  |  | 7,702 |  |  |  | — |  |  |  | (22 | ) |  |  | 7,680 |
Total |  | $ | 25,553 |  |  | $ | — |  |  | $ | (82 | ) |  | $ | 25,471 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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