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Stock-based Compensation - Stock Option Activity (Details) shares in Thousands	6 Months Ended	9 Months Ended
	Jun. 30, 2022 $ / shares shares	Sep. 30, 2021
Number of Options
Outstanding at beginning of period (shares) | shares	3,266
Granted (shares) | shares	1,247
Exercised (shares) | shares	(47)
Cancelled (shares) | shares	(83)
Outstanding at end of period (shares) | shares	4,383
Exercisable at end of period (shares) | shares	1,165
Weighted-Average Exercise Price
Weighted-Average Exercise Price - Outstanding at beginning of period (in usd per share) | $ / shares	$ 8.24
Weighted-Average Exercise Price - Granted (in usd per share) | $ / shares	9.37
Weighted-Average Exercise Price - Exercised (in usd per share) | $ / shares	2.81
Weighted-Average Exercise Price - Cancelled (in usd per share) | $ / shares	7.25
Weighted-Average Exercise Price - Outstanding at end of period (in usd per share) | $ / shares	8.64
Weighted-Average Exercise Price - Exercisable at end of period (in usd per share) | $ / shares	$ 7.40
Weighted-Average Remaining Contractual Life (in years)
Weighted Average Remaining Contractual Life - Outstanding	8 years 9 months 10 days	9 years 7 days
Weighted Average Remaining Contractual Life - Exercisable	8 years 3 months 14 days

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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