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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

X

- Definition

Accrued transaction-related acquisition costs.

+ References

No definition available.

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X

- 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

Transaction-related acquisition costs.

+ References

No definition available.

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X

- 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

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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-URI https://asc.fasb.org/1943274/2147479402/808-10-50-1

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