SEGMENT INFORMATION - Operations by Business Segment (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues
Total revenue	$ 23,783,000	$ 36,186,000	$ 81,900,000	$ 104,319,000
Cost of sales (excluding impairment loss, depreciation and amortization)
Total cost of sales (excluding impairment loss, depreciation and amortization)	13,817,000	21,228,000	47,949,000	63,174,000
Impairment loss on intangible assets
Total impairment loss on intangible assets	5,333,000	0	5,333,000	0
Depreciation and amortization
Depreciation and amortization	1,490,000	1,945,000	4,807,000	2,291,000
Gross profit
Total gross profit	3,143,000	13,013,000	23,811,000	38,854,000
Operating expenses	32,007,000	22,706,000	69,757,000	70,984,000
Operating loss	(28,864,000)	(9,693,000)	(45,946,000)	(32,130,000)
Other income	983,000	1,222,000	3,299,000	5,367,000
Interest expense	(157,000)	(178,000)	(492,000)	(611,000)
Loss before income taxes	(28,038,000)	(8,649,000)	(43,139,000)	(27,374,000)
Provision for income taxes	(17,000)	(23,000)	(51,000)	(68,000)
Net loss	(28,055,000)	(8,672,000)	(43,190,000)	(27,442,000)
Impairment loss on intangible assets	0	0	0	0
Impairment loss on intangible assets	6,373,000	349,000	6,373,000	349,000
Security Solutions
Revenues
Total revenue	18,332,000	19,795,000	54,839,000	56,764,000
Cost of sales (excluding impairment loss, depreciation and amortization)
Total cost of sales (excluding impairment loss, depreciation and amortization)	9,201,000	8,498,000	26,505,000	25,304,000
Impairment loss on intangible assets
Total impairment loss on intangible assets	5,333,000	0	5,333,000	0
Depreciation and amortization
Depreciation and amortization	1,488,000	1,943,000	4,800,000	2,281,000
Gross profit
Total gross profit	2,310,000	9,354,000	18,201,000	29,179,000
Secure Networks
Revenues
Total revenue	5,451,000	16,391,000	27,061,000	47,555,000
Cost of sales (excluding impairment loss, depreciation and amortization)
Total cost of sales (excluding impairment loss, depreciation and amortization)	4,616,000	12,730,000	21,444,000	37,870,000
Impairment loss on intangible assets
Total impairment loss on intangible assets	0	0	0	0
Depreciation and amortization
Depreciation and amortization	2,000	2,000	7,000	10,000
Gross profit
Total gross profit	$ 833,000	$ 3,659,000	$ 5,610,000	$ 9,675,000