SEGMENT INFORMATION - Operations by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 32,911	$ 55,791	$ 68,133	$ 105,951
Total gross profit	12,359	20,929	25,841	39,800
Selling, general and administrative expenses	21,826	34,965	48,278	70,203
Operating loss	(9,467)	(14,036)	(22,437)	(30,403)
Other income	1,649	118	4,145	130
Interest expense	(184)	(187)	(433)	(377)
Loss before income taxes	(8,002)	(14,105)	(18,725)	(30,650)
Provision for income taxes	(22)	(54)	(45)	(125)
Net loss	(8,024)	(14,159)	(18,770)	(30,775)
Security Solutions
Segment Reporting Information [Line Items]
Total revenue	17,196	30,819	36,969	57,738
Total gross profit	9,551	16,433	19,825	31,485
Secure Networks
Segment Reporting Information [Line Items]
Total revenue	15,715	24,972	31,164	48,213
Total gross profit	$ 2,808	$ 4,496	$ 6,016	$ 8,315