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Fair Value Measurements (Tables) | 3 Months Ended
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Dec. 31, 2024
Fair Value Disclosures [Abstract] |
Schedule of Unrealized Gain (Loss) on Investments | The following tables present the Company’s cash equivalents and marketable securities’ costs, gross unrealized gains and losses, and fair value by major security type recorded as cash equivalents or short-term or long-term marketable securities as of December 31, 2024, and September 30, 2024. Unrealized gains and losses from the remeasurement of marketable securities are recorded in accumulated other comprehensive loss until recognized in earnings upon the sale or maturity of the security.
|  | December 31, 2024 |
|  | Cost Basis |  |  | Gross Unrealized Gain |  |  | Gross Unrealized Loss |  |  | Fair Value |  |  | Cash Equivalents |  |  | Short-term Securities |  |  | Long-term Securities |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 1,279 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,279 |  |  | $ | 1,279 |  |  | $ | — |  |  | $ | — |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | 253 |  |  |  | — |  |  |  | — |  |  |  | 253 |  |  |  | — |  |  |  | 253 |  |  |  | — |
U.S. government agency bonds |  |  | 641 |  |  |  | — |  |  |  | — |  |  |  | 641 |  |  |  | — |  |  |  | 641 |  |  |  | — |
Municipal securities |  |  | 2,306 |  |  |  | 1 |  |  |  | (1 | ) |  |  | 2,306 |  |  |  | — |  |  |  | 2,001 |  |  |  | 305 |
Corporate bonds |  |  | 2,250 |  |  |  | 1 |  |  |  | — |  |  |  | 2,251 |  |  |  | — |  |  |  | 2,251 |  |  |  | — |
Subtotal |  |  | 5,450 |  |  |  | 2 |  |  |  | (1 | ) |  |  | 5,451 |  |  |  | — |  |  |  | 5,146 |  |  |  | 305 |
Total |  | $ | 6,729 |  |  | $ | 2 |  |  | $ | (1 | ) |  | $ | 6,730 |  |  | $ | 1,279 |  |  | $ | 5,146 |  |  | $ | 305 |
|  | September 30, 2024 |
|  | Cost Basis |  |  | Gross Unrealized Gain |  |  | Gross Unrealized Loss |  |  | Fair Value |  |  | Cash Equivalents |  |  | Short-term Securities |  |  | Long-term Securities |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 301 |  |  | $ | — |  |  | $ | — |  |  | $ | 301 |  |  | $ | 301 |  |  | $ | — |  |  | $ | — |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | 401 |  |  |  | — |  |  |  | — |  |  |  | 401 |  |  |  | 152 |  |  |  | — |  |  |  | 249 |
U.S. government agency bonds |  |  | 2,591 |  |  |  | 3 |  |  |  | — |  |  |  | 2,594 |  |  |  | — |  |  |  | 2,594 |  |  |  | — |
Municipal securities |  |  | 2,127 |  |  |  | 2 |  |  |  | — |  |  |  | 2,129 |  |  |  | — |  |  |  | 2,129 |  |  |  | — |
Corporate bonds |  |  | 3,219 |  |  |  | 3 |  |  |  | — |  |  |  | 3,222 |  |  |  | — |  |  |  | 3,222 |  |  |  | — |
Subtotal |  |  | 8,338 |  |  |  | 8 |  |  |  | — |  |  |  | 8,346 |  |  |  | 152 |  |  |  | 7,945 |  |  |  | 249 |
Total |  | $ | 8,639 |  |  | $ | 8 |  |  | $ | — |  |  | $ | 8,647 |  |  | $ | 453 |  |  | $ | 7,945 |  |  | $ | 249 |
Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value | The following table summarizes the fair value and gross unrealized losses related to available-for-sale debt securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2024:
|  | As of December 31, 2024 |
|  | In loss position < 12 months |  |  | In loss position > 12 months |  |  | Total in loss position |
|  | Fair Value |  |  | Gross Unrealized Loss |  |  | Fair Value |  |  | Gross Unrealized Loss |  |  | Fair Value |  |  | Gross Unrealized Loss |
Certificates of deposit |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
U.S. government agency bonds |  |  | 292 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 292 |  |  |  | — |
Municipal securities |  |  | 1,447 |  |  |  | (1 | ) |  |  | — |  |  |  | — |  |  |  | 1,447 |  |  |  | (1 | )
Corporate bonds |  |  | 547 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 547 |  |  |  | — |
|  | $ | 2,286 |  |  | $ | (1 | ) |  | $ | — |  |  | $ | — |  |  | $ | 2,286 |  |  | $ | (1 | )
Schedule of Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis | The change in the carrying amount of the holdback liability was as follows:
Balance as of September 30, 2024 |  | $ | 250 |
Payment |  |  | (250 | )
Balance as of December 31, 2024 |  | $ | — |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of liabilities measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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