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Investments | 12 Months Ended
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Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract] |
Investments | Investments In February 2020, we raised approximately $49.5 million in net proceeds from an underwritten public offering of shares of our common stock. See Note 15 “Shareholders’ Equity” for further details on the equity offering. We invested a portion of the proceeds from the equity offering in held-to-maturity securities, which primarily consist of corporate bonds from large cap industrial and selected financial companies with a minimum credit rating of A. We have the ability and intention to hold these investments until maturity and therefore have classified these investments as held-to-maturity and recorded them at amortized cost. The amortized cost, gross unrealized gains or losses, and fair value of investments classified as held-to-maturity at September 30, 2020 were as follows:
|  |  |  | Gross Unrealized |  | Estimated Fair
Due in less than 1 year: |  | Amortized Cost |  | Gains |  | Losses |  | Market Value
Corporate and municipal bonds |  | $ | 38,055 |  |  | $ | 10 |  |  | $ | (33) |  |  | $ | 38,032 |
Total as of September 30, 2020 |  | $ | 38,055 |  |  | $ | 10 |  |  | $ | (33) |  |  | $ | 38,032 |
Investments are exposed to various risks, including interest rate, market and credit risk. As a result, it is possible that changes in the values of these investments may occur and that such changes could affect the amounts reported in the condensed consolidated financial statements.

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