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Goodwill and intangible assets (Tables) | 9 Months Ended
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Jun. 30, 2025
Goodwill and intangible assets |
Schedule of intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of | ​ | As of | ​
​ | ​ | June 30, 2025 | ​ | September 30, 2024 |
Customer relationships | ​ | $ | 79,088 | ​ | $ | 79,088 | ​
Trade names | ​ | ​ | 11,581 | ​ | ​ | 11,581 | ​
Customer contracts | ​ | ​ | 3,851 | ​ | ​ | 3,851 | ​
Non-compete agreements | ​ | ​ | 710 | ​ | ​ | 710 | ​
Intangible assets, gross | ​ | ​ | 95,230 | ​ | ​ | 95,230 | ​
Less: accumulated amortization | ​ | ​ | (31,825) | ​ | ​ | (27,277) | ​
Intangible assets, net | ​ | $ | 63,405 | ​ | $ | 67,953 | ​
Schedule of annual amortization of intangible asset | ​
​ | ​ | ​ | ​
​ | ​ | Estimated
Period |  | Amortization
Three months ending September 30, 2025 | ​ | $ | 1,468
Year ending September 30, 2026 | ​ | ​ | 5,776
Year ending September 30, 2027 | ​ | ​ | 5,723
Year ending September 30, 2028 | ​ | ​ | 5,594
Year ending September 30, 2029 | ​ | ​ | 5,587
Thereafter | ​ | ​ | 39,257
Intangible assets, net | ​ | $ | 63,405
​

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