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Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Financial assets: |  |
Cash equivalents | $ 118,396 | $ 105,299
Marketable securities: |  | 59,099
Derivative instruments | 1,119 | 903
Convertible note | 1,000 |
Total financial assets | 120,515 | 165,301
Financial liabilities: |  |
Forward contracts | 1,080 | 1,073
Total financial liabilities | 1,080 | 1,073
Corporate notes/bonds |  |
Financial assets: |  |
Marketable securities: |  | 59,099
Level 1 |  |
Financial assets: |  |
Cash equivalents | 118,396 | 105,299
Derivative instruments | 0 | 0
Convertible note | 0 |
Total financial assets | 118,396 | 164,398
Financial liabilities: |  |
Forward contracts | 0 | 0
Total financial liabilities | 0 | 0
Level 1 | Corporate notes/bonds |  |
Financial assets: |  |
Marketable securities: |  | 59,099
Level 2 |  |
Financial assets: |  |
Cash equivalents | 0 | 0
Derivative instruments | 1,119 | 903
Convertible note | 0 |
Total financial assets | 1,119 | 903
Financial liabilities: |  |
Forward contracts | 1,080 | 1,073
Total financial liabilities | 1,080 | 1,073
Level 2 | Corporate notes/bonds |  |
Financial assets: |  |
Marketable securities: |  | 0
Level 3 |  |
Financial assets: |  |
Cash equivalents | 0 | 0
Derivative instruments | 0 | 0
Convertible note | 1,000 |
Total financial assets | 1,000 | 0
Financial liabilities: |  |
Forward contracts | 0 | 0
Total financial liabilities | $ 0 | 0
Level 3 | Corporate notes/bonds |  |
Financial assets: |  |
Marketable securities: |  | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount 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/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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