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Stock-based Compensation Plans (Tables) | 6 Months Ended
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Mar. 31, 2023
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock-based Compensation Expenses | Stock-based compensation expense was reported as follows in the condensed consolidated statements of operations:
| Three Months Ended March 31, |  |  | Six Months Ended March 31, |
(In thousands) | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Product costs | $ | 72 |  |  | $ | 78 |  |  | $ | 139 |  |  | $ | 108 |
Research and development |  | 329 |  |  |  | 296 |  |  |  | 703 |  |  |  | 731 |
Selling, general and administrative |  | 1,381 |  |  |  | 1,345 |  |  |  | 2,905 |  |  |  | 2,560 |
Total | $ | 1,782 |  |  | $ | 1,719 |  |  | $ | 3,747 |  |  | $ | 3,399 |
Summary of Stock Option Grant Activity | Stock option grant activity was as follows:
| Six Months Ended March 31, |
| 2023 |  |  | 2022 |
Stock option grant activity: |  |  |  |  |
Stock options granted |  | 293,000 |  |  |  | 283,000 |
Weighted average grant date fair value | $ | 15.27 |  |  | $ | 16.36 |
Weighted average exercise price | $ | 35.40 |  |  | $ | 43.72 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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