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Goodwill - Changes in Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2026	Sep. 30, 2025
Goodwill
Balance at the beginning of the period	$ 102,875	$ 97,792
Translation adjustments	(118)	17
Balance at the end of the period	102,757	102,875
Auction Software Acquisition
Goodwill
Acquisition		5,066
GovDeals
Goodwill
Balance at the beginning of the period	61,683	61,683
Translation adjustments	0	0
Balance at the end of the period	61,683	61,683
CAG
Goodwill
Balance at the beginning of the period	21,568	21,551
Translation adjustments	(118)	17
Balance at the end of the period	21,450	21,568
Machinio & Software Solutions
Goodwill
Balance at the beginning of the period	19,624	14,558
Translation adjustments	0	0
Balance at the end of the period	$ 19,624	19,624
Machinio & Software Solutions | Auction Software Acquisition
Goodwill
Acquisition		$ 5,066

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