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Revenue - Deferred revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenue |  |  |
Balance, beginning of the period | $ 210,885 | $ 154,777 | $ 68,436
Deferral of revenue | 65,708 | 185,688 | 146,674
Recognition of deferred revenue | (138,419) | (129,580) | (60,333)
Balance, end of the period | 138,174 | $ 210,885 | $ 154,777
Reclassification from deferred revenue to refund liability | $ 12,700 |  |

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- Definition The amount of deferral of revenue in obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References No definition available. + Details
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Namespace Prefix: | acls_
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- Definition The returned current portion, due within one year or one operating cycle, if longer, of deposits held other than customer deposits. + References No definition available. + Details
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Namespace Prefix: | acls_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
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X
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
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Balance Type: | credit
Period Type: | duration

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