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v3.26.1

OPERATING SEGMENT INFORMATION (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2026 USD ($) segment | Mar. 31, 2025 USD ($)
OPERATING SEGMENT INFORMATION |  |
Number of operating segments | segment | 2 |
Number of reportable segments | segment | 2 |
Revenue | $ 162,606 | $ 181,279
Reconciliation of segment adjusted gross profit to gross profit and loss before income taxes |  |
Gross profit | 69,691 | 82,370
Research and development expense | 44,445 | 43,568
Sales and marketing expense | 32,269 | 31,788
General and administrative expense | 16,978 | 15,128
Amortization of acquired intangible assets | 5,656 | 6,155
Restructuring and related | 2,038 | 5,341
Interest expense, net | 9,756 | 10,500
Other income, net | (514) | (3,129)
Loss before income taxes | (40,937) | (26,981)
Segment depreciation expense: |  |
Depreciation expense | 4,460 | 3,469
Operating segment |  |
OPERATING SEGMENT INFORMATION |  |
Revenue | 162,606 | 181,279
Total segment adjusted gross profit | 74,457 | 88,110
Reconciling items |  |
Reconciliation of segment adjusted gross profit to gross profit and loss before income taxes |  |
Stock-based compensation expense | (204) | (352)
Amortization of acquired technology | (4,562) | (5,388)
Cloud and Edge |  |
Segment depreciation expense: |  |
Depreciation expense | 2,322 | 2,353
Cloud and Edge | Operating segment |  |
OPERATING SEGMENT INFORMATION |  |
Revenue | 99,512 | 107,591
Total segment adjusted gross profit | 56,522 | 67,296
IP Optical Networks |  |
Segment depreciation expense: |  |
Depreciation expense | 2,138 | 1,116
IP Optical Networks | Operating segment |  |
OPERATING SEGMENT INFORMATION |  |
Revenue | 63,094 | 73,688
Total segment adjusted gross profit | $ 17,935 | $ 20,814

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