SEGMENT INFORMATION - Operations by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 35,222	$ 50,160
Total gross profit	13,482	18,871
Selling, general and administrative expenses	26,452	35,238
Operating loss	(12,970)	(16,367)
Other income	2,496	12
Interest expense	(249)	(190)
Loss before income taxes	(10,723)	(16,545)
Provision for income taxes	(23)	(71)
Net loss	(10,746)	(16,616)
Security Solutions
Segment Reporting Information [Line Items]
Total revenue	19,773	26,919
Total gross profit	10,274	15,051
Secure Networks
Segment Reporting Information [Line Items]
Total revenue	15,449	23,241
Total gross profit	$ 3,208	$ 3,820