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SEGMENT INFORMATION, GEOGRAPHIC INFORMATION AND CUSTOMER CONCENTRATION - Financial Information by Reportable Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |
Total net revenue | $ 507,149 | $ 378,831 | $ 402,874
Gross profit | 259,742 | 194,997 | 223,012
Operating income (loss) | 18,809 | (12,449) | 13,083
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net revenue | 507,149 | 378,831 | 402,874
Gross profit | 262,659 | 198,753 | 230,704
Operating income (loss) | 44,059 | 12,977 | 38,008
Operating Segments | Video |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net revenue | 288,507 | 242,510 | 278,028
Gross profit | 169,468 | 132,092 | 162,156
Operating income (loss) | 28,460 | 1,326 | 15,837
Operating Segments | Cable Access |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net revenue | 218,642 | 136,321 | 124,846
Gross profit | 93,191 | 66,661 | 68,548
Operating income (loss) | $ 15,599 | $ 11,651 | $ 22,171

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