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