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Plan of Merger (Details Textual) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended
--- | --- | ---
Oct. 29, 2025 | Mar. 31, 2026
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |
Transaction-related costs |  | $ 9.7
Transaction-related costs paid |  | $ 19.0
NEC Merger Agreement |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |
Merger consideration per share | $ 80.7 |
Seller termination fee | $ 82.0 |
Purchaser termination fee | $ 135.0 |

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- Definition Accrued transaction-related acquisition costs. + References No definition available. + Details
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- Definition The termination fee the Acquirer (NEC) would be required to pay the Acquiree (CSG) should the Merger Agreement is terminated under certain specified circumstances. + References No definition available. + Details
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- Definition The termination fee the Acquiree (CSG) would be required to pay the Acquirer (NEC) should the agreement be terminated under certain specified circumstances, including the termination by CSG. + References No definition available. + Details
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- Definition Per share price of saleable stock paid or offered to be paid by acquirer in business combination. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479299/805-40-55-10 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-8 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-42 + Details
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- Details
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