Segment Information - Schedule of Total Segment Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Assets	$ 375,101	$ 346,888
Operating Segments | GovDeals
Segment Reporting Information [Line Items]
Assets	381,654	324,145
Operating Segments | RSCG
Segment Reporting Information [Line Items]
Assets	141,046	138,082
Operating Segments | CAG
Segment Reporting Information [Line Items]
Assets	100,643	98,716
Operating Segments | Machinio & Software Solutions
Segment Reporting Information [Line Items]
Assets	54,364	41,871
Corporate & Other
Segment Reporting Information [Line Items]
Assets	$ (302,606)	$ (255,926)