XML 114 R92.htm IDEA: XBRL DOCUMENT v3.25.4
OPERATING SEGMENT INFORMATION (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
USD ($)
segment
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
OPERATING SEGMENT INFORMATION      
Number of operating segments | segment 2    
Number of reportable segments | segment 2    
Revenue $ 844,556 $ 833,881 $ 826,339
Gross profit 420,706 439,512 408,083
Research and development expense 178,872 179,941 190,660
Sales and marketing expense 133,075 137,830 137,460
General and administrative expense 64,239 68,740 54,962
Amortization of acquired intangible assets 23,849 25,969 28,601
Acquisition-, disposal- and integration-related expense 4,337   4,476
Restructuring and related 19,658 10,160 16,209
Interest expense, net 44,011 33,821 27,320
Other (income) expense, net (2,226) 29,119 3,768
Loss before income taxes (45,109) (46,068) (55,373)
Segment depreciation expense:      
Depreciation expense 16,728 13,539 14,105
Operating segment      
OPERATING SEGMENT INFORMATION      
Revenue 844,556 833,881 826,339
Cost of revenue 423,850 394,369 418,256
Total segment adjusted gross profit 442,010 466,030 439,030
Reconciling items      
OPERATING SEGMENT INFORMATION      
Stock-based compensation expense (960) (1,625) (2,657)
Amortization of acquired technology (20,344) (24,893) (28,290)
Cloud and Edge      
Segment depreciation expense:      
Depreciation expense 9,554 9,337 9,798
Cloud and Edge | Operating segment      
OPERATING SEGMENT INFORMATION      
Revenue 511,430 505,157 477,647
Cost of revenue 188,355 175,940 177,629
Total segment adjusted gross profit 326,717 338,194 314,594
IP Optical Networks      
Segment depreciation expense:      
Depreciation expense 7,174 4,202 4,307
IP Optical Networks | Operating segment      
OPERATING SEGMENT INFORMATION      
Revenue 333,126 328,724 348,692
Cost of revenue 235,495 218,429 240,627
Total segment adjusted gross profit $ 115,293 $ 127,836 $ 124,436