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Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Jun. 30, 2021
Accumulated Other Comprehensive Loss |
Schedule of Accumulated Other Comprehensive Income (Loss) | The components of accumulated other comprehensive loss are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | September 30,
​ |  | 2021 |  | 2020
​ | ​ | (Amounts in thousands)
Cumulative effect of foreign currency translation | ​ | $ | (4,313) | ​ | $ | (4,696)
Cumulative unrealized loss on pension liability | ​ |  | (7,299) | ​ |  | (7,299)
Accumulated other comprehensive loss | ​ | $ | (11,612) | ​ | $ | (11,995)

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