Basis of Presentation and Summary of Significant Accounting Policies - Contract Assets and Liabilities (Details) - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Capitalized Contract Cost [Line Items]
Current contract assets	$ 800,000	$ 1,700,000	$ 900,000
Retainage included in current contract assets	100,000
Non-current contract assets	0	0	0
Current contract liabilities	1,500,000	2,200,000	1,900,000
Non-current contract liabilities	37,000	0	$ 0
Revenue recognized included in contract liability	$ 1,800,000
Practical Expedient, Incremental Costs	true
Current capitalized costs	$ 33,000	177,000
Non-current capitalized costs	0
Incremental costs amortized	217,000	477,000
Impairment related to costs capitalized	$ 0	0
Payment terms	30 days
Remaining Performance Obligation, Optional Exemption	true
Technology Solutions Segment
Capitalized Contract Cost [Line Items]
Current capitalized costs	$ 0
Non-current capitalized costs	0	0
Incremental costs amortized	9,000
Impairment related to costs capitalized	$ 0	$ 0
Europe | Maximum
Capitalized Contract Cost [Line Items]
Payment terms	90 days