Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows used in operating activities
Net loss	$ (14,873,000)	$ (10,353,000)
Adjustments to reconcile net loss to net cash used in operating activities
Gain on bargain purchase		(10,911,000)
Loss (gain) on debt and payables extinguishment	1,060,000	(2,900,000)
Gain on sale of property and equipment	(146,000)
Stock-based compensation (option awards)	3,728,000	2,209,000
Stock-based compensation (payments for payroll and consultants)	1,793,000	3,042,000
Stock issuance commitments	519,000	715,000
Provision for bad debt	142,000	335,000
Inventory valuation adjustments	473,000	1,781,000
Depreciation and amortization	2,953,000	4,398,000
Impairment charge	413,000
Change in fair value of derivative liabilities	(3,186,000)	(105,000)
Guaranteed interest and debt issuance costs		434,000
Line of credit commitment fee		302,000
Non-cash interest costs	2,301,000
Changes in assets and liabilities
Accounts receivable	1,811,000	(1,073,000)
Inventories	775,000	2,015,000
Prepaid expenses and other current assets	(186,000)	463,000
Accounts payable	(3,365,000)	2,996,000
Accrued expenses and interest expense	(1,178,000)	329,000
Deferred revenue and customer deposits	984,000	446,000
Due to related parties	(397,000)	1,392,000
Net cash used in operating activities	(6,379,000)	(4,485,000)
Cash flows provided (used) in investing activities
Proceeds from sale of property and equipment	250,000
Cash disbursed for property and equipment	(69,000)	(374,000)
Cash used in Vislink acquisition		(6,500,000)
Net cash provided (used) in investing activities	181,000	(6,874,000)
Cash flows provided by financing activities
Principal repayments made on capital lease obligations	(48,000)	(59,000)
Proceeds from multiple issuances of convertible preferred stock, common stock and warrants		6,700,000
Costs incurred in connection with multiple financings		(900,000)
Principle repayments of Vislink notes		(2,000,000)
Principle repayments of notes payable		(824,000)
Proceeds received from the exercise of warrants		2,124,000
Proceeds from convertible promissory notes	6,000,000
Payment of issuance costs on convertible promissory notes	(433,000)
Principal repayments on convertible promissory notes	(84,000)
Net cash provided by financing activities	5,435,000	5,041,000
Effect of exchange rate changes on cash	(31,000)	63,000
Net decrease in cash	(794,000)	(6,255,000)
Cash, beginning of year	2,799,000	9,054,000
Cash, end of year	2,005,000	2,799,000
Cash paid for interest	36,000	242,000
Cash paid for taxes
Supplemental cash flow disclosures of non-cash investing and financing activities Common stock issued in connection with:
Conversion of amounts due to related parties	240,000	490,000
Compensation awards previously accrued	19,000	295,000
Conversion of principal and interest under convertible promissory notes	2,339,000
Conversion of Series D Convertible Preferred Stock		648,000
Stock issued as payment of interest on convertible notes	180,000	180,000
Beneficial conversion feature	284,000
Compensatory fee for debt modification	160,000
Settlement of notes payable to sellers of Vislink with assumption of liabilities and debt extinguishment		7,500,000
Effect of the December 3, 2018 modification of the May 2018 debt instruments	4,131,000
Purchase Consideration
Amount of consideration:		16,000,000
Assets acquired and liabilities assumed at fair value
Accounts receivable		7,129,000
Inventories		15,232,000
Property and equipment		3,868,000
Other current assets		944,000
Accounts payable and deferred revenue		(2,294,000)
Customer deposits		(1,137,000)
Accrued expenses		(451,000)
Net tangible assets acquired		23,291,000
Identifiable intangible assets
Trade names and technology		1,100,000
Customer relationships		2,520,000
Total Identifiable Intangible Assets		3,620,000
Total net assets acquired		26,911,000
Consideration		16,000,000
Gain on bargain purchase		$ 10,911,000