SEGMENT INFORMATION - Operations by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues [Abstract]
Total revenue	$ 28,498	$ 32,911	$ 58,117	$ 68,133
Gross profit
Total gross profit	9,707	12,359	20,668	25,841
Research and development expenses	1,459	2,646	4,629	5,479
Selling, general and administrative expenses	16,892	19,180	33,121	42,799
Operating loss	(8,644)	(9,467)	(17,082)	(22,437)
Other income	1,064	1,649	2,316	4,145
Interest expense	(160)	(184)	(335)	(433)
Loss before income taxes	(7,740)	(8,002)	(15,101)	(18,725)
Provision for income taxes	(17)	(22)	(34)	(45)
Net loss	(7,757)	(8,024)	(15,135)	(18,770)
Security Solutions
Revenues [Abstract]
Total revenue	17,867	17,196	36,507	36,969
Gross profit
Total gross profit	7,265	9,551	15,891	19,825
Secure Networks
Revenues [Abstract]
Total revenue	10,631	15,715	21,610	31,164
Gross profit
Total gross profit	$ 2,442	$ 2,808	$ 4,777	$ 6,016