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Accumulated Other Comprehensive Loss | 12 Months Ended
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Sep. 30, 2023
Accumulated Other Comprehensive Loss. |
Accumulated Other Comprehensive Loss | 4. Accumulated Other Comprehensive Loss The components of accumulated other comprehensive loss are as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Effect of |  | ​ | ​ |  | Accumulated
​ | ​ | Foreign | ​ | Minimum | ​ | Other
​ | ​ | Currency | ​ | Pension | ​ | Comprehensive
​ | ​ | Translation | ​ | Liability | ​ | Loss
​ | ​ | (Amounts in thousands)
Balance as of September 30, 2021 | ​ | $ | (4,050) | ​ | $ | (5,398) | ​ | $ | (9,448)
Change in period | ​ |  | (1,741) | ​ |  | 4,096 | ​ |  | 2,355
Tax effect of change in period | ​ |  | — | ​ |  | (235) | ​ |  | (235)
Balance as of September 30, 2022 | ​ | $ | (5,791) | ​ | $ | (1,537) | ​ | $ | (7,328)
Change in period | ​ |  | 962 | ​ |  | 244 | ​ |  | 1,206
Tax effect of change in period | ​ |  | — | ​ |  | 28 | ​ |  | 28
Balance as of September 30, 2023 | ​ | $ | (4,829) | ​ | $ | (1,265) | ​ | $ | (6,094)
​ The changes in the minimum pension liability are net of an amortization gain of $200 thousand in 2023 and a loss of $91 thousand in 2022 included in net periodic pension cost.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//220/tableOfContent + Details
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