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Business Combinations - Additional Information (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
May 27, 2022
Mar. 03, 2021
Feb. 05, 2021
Oct. 31, 2022
Apr. 30, 2021
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Business Acquisition [Line Items]                
Goodwill           $ 19,420 $ 6,145 $ 6,145
Reduction of goodwill           $ (2,200)    
Optelian Access Networks Corporation                
Business Acquisition [Line Items]                
Purchase price     $ 7,500          
Goodwill     1,900          
Optelian Access Networks Corporation | Optelian Products                
Business Acquisition [Line Items]                
Purchase price     1,900          
Held back amount     $ 300          
RIFT Inc                
Business Acquisition [Line Items]                
Purchase price   $ 500            
Goodwill   $ 200            
Held back amount released         $ 200      
ASSIA                
Business Acquisition [Line Items]                
Purchase price $ 25,000              
Business combination discount rate 23.00%              
Goodwill $ 13,268              
Business combination hold back amounts to be released $ 2,500              
Reason for business combination The CloudCheck® and Expresse® solutions are currently deployed in over 125 million connected homes globally, and many of these connections now represent recurring software revenue opportunities for DZS.              
ASSIA | Subsequent Event                
Business Acquisition [Line Items]                
Purchase price       $ 1,350