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Assets and Liabilities Held for Sale and Discontinued Operations - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 05, 2024
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
DZS, Inc | Affiliated Entity | Dasan Networks, Inc.          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
DNI direct ownership interest   24.10%   24.10%  
Disposal Group, Held-for-Sale, Not Discontinued Operations | DASAN Network Solutions, Inc., D-Mobile Limited, DZS Vietnam, Dasan India Private Limited and DZS Japan          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Cash proceeds from divestiture $ 3.8        
Disposal Group, Held-for-Sale, Not Discontinued Operations | DASAN Network Solutions, Inc., D-Mobile Limited, DZS Vietnam, Dasan India Private Limited and DZS Japan | DNS Korea | Master Engineering Services Agreement          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Annual purchase commitment $ 2.5        
Term of service agreement 7 years        
Term of service agreement renewal 12 months        
Expiration period 3 years        
Required notice of termination 180 days        
Disposal Group, Held-for-Sale, Not Discontinued Operations | DASAN Network Solutions, Inc., D-Mobile Limited, DZS Vietnam, Dasan India Private Limited and DZS Japan | DNS Korea | Master Supply Agreement          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Term of service agreement 3 years        
Term of service agreement renewal 1 year        
Disposal Group, Held-for-Sale, Not Discontinued Operations | DASAN Network Solutions, Inc., D-Mobile Limited, DZS Vietnam, Dasan India Private Limited and DZS Japan | DNS Korea | Reseller Agreement          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Term of service agreement 7 years        
Term of service agreement renewal 12 months        
Disposal Group, Held-for-Sale, Not Discontinued Operations | DASAN Network Solutions, Inc., D-Mobile Limited, DZS Vietnam, Dasan India Private Limited and DZS Japan | DNS Korea | Master Services Agreement          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Term of service agreement 1 year        
Term of service agreement renewal 12 months        
Required notice of termination 60 days        
Disposal Group, Held-for-Sale, Not Discontinued Operations | DASAN Network Solutions, Inc., D-Mobile Limited, DZS Vietnam, Dasan India Private Limited and DZS Japan | DNI Loan Agreements          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Debt eliminated in divestiture $ 34.3        
Disposal Group, Held-for-Sale, Not Discontinued Operations | DASAN Network Solutions, Inc., D-Mobile Limited, DZS Vietnam, Dasan India Private Limited and DZS Japan | DNI Loan Agreements | Investor          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Net revenue   $ 0.4 $ 0.1 $ 0.4 $ 0.3
Cost of revenue (reversal)   0.3   0.3 $ 0.2
Long-term debt classified as held-for-sale   $ 30.6   $ 30.6