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Note 11 - Stock-based Compensation (Tables)

9 Months Ended

Jun. 30, 2025

Notes Tables

Share-Based Payment Arrangement, Cost by Plan [Table Text Block]

​		Three Months Ended June 30,								Nine Months Ended June 30,
​		2025				2024				2025				2024
Restricted stock units		$	1,973			$	3,381			$	14,408			$	11,122
Employee stock purchase plan			242				310				711				980
Total stock-based compensation expense		$	2,215			$	3,691			$	15,119			$	12,102

Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

​		​				Weighted
​		​				Average
​		​				Grant-Date
​		Shares				Fair Value
Outstanding as of September 30, 2024			764,111			$	59.65
Granted			641,843			$	45.00
Vested			(188,605	)		$	59.13
Forfeited			(131,421	)		$	73.80
Outstanding as of June 30, 2025			1,085,928			$	49.38

​		Nine Months Ended June 30,
​		2025				2024
Time-based restricted stock units			448,375				220,641
Performance-based restricted stock units			193,468				389,933
Total units			641,843				610,574

X

- Definition

Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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X

- Definition

Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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