CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Viscount Systems, Inc.	3VR Security	Thursby Sofware Systems	Series B Preferred Stock	Common Stock	Common Stock Viscount Systems, Inc.	Common Stock 3VR Security	Common Stock Thursby Sofware Systems	Additional Paid-in Capital	Additional Paid-in Capital Viscount Systems, Inc.	Additional Paid-in Capital 3VR Security	Additional Paid-in Capital Thursby Sofware Systems	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income	Noncontrolling Interest
Beginning Balances at Dec. 31, 2017	$ 23,853				$ 3	$ 15				$ 428,470				$ (7,485)	$ (399,647)	$ 2,675	$ (178)
Beginning Balances (in shares) at Dec. 31, 2017					3,000,000	14,436,000
Net loss	(4,703)														(4,708)		5
Unrealized income (loss) from foreign currency translation adjustments	(463)															(466)	3
Impact of adoption of ASC Topic 606 | Topic 606	2														2
Issuance of Series B preferred stock,net of issuance costs	7,876				$ 2					7,874
Issuance of Series B preferred stock, net of issuance costs (shares)					2,000,000
Issuance of common stock in connection with acquisition			$ 2,635	$ 2,497				$ 1	$ 1			$ 2,634	$ 2,496
Issuance of common stock in connection with acquisition (shares)								724,000	427,000
Issuance of common stock in connection with vesting of stock awards (shares)						515,000
Proceeds of exercise of stock options	13									13
Proceed of exercise of stock options (shares)						3,000
Stock-based compensation	2,646									2,646
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(668)													(668)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)						(142,000)
Issuance of shares to non-employees	12									12
Issuance of shares to non-employees (shares)						4,000
Ending Balances at Dec. 31, 2018	33,700				$ 5	$ 17				444,145				(8,153)	(404,353)	2,209	(170)
Ending Balances (in shares) at Dec. 31, 2018					5,000,000	15,967,000
Net loss	(1,151)														(1,151)
Unrealized income (loss) from foreign currency translation adjustments	(151)															(151)
Cancellation of holdback shares in connection with acquisition	(340)									(340)
Cancellation of holdback shares in connection with acquisition (shares)						(93,000)
Issuance of common stock in connection with acquisition		$ 1,635					$ 1				$ 1,634
Issuance of common stock in connection with acquisition (shares)							419,000
Issuance of common stock in connection with vesting of stock awards (shares)						859,000
Proceeds of exercise of stock options	$ 13									13
Proceed of exercise of stock options (shares)	2,500
Stock-based compensation	$ 2,650									2,650
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(890)													(890)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)						(176,000)
Issuance of common stock in connection with warrant exercise (shares)						10,000
Liquidation of subsidiary with noncontrolling interest	33									(137)						(33)	$ 170
Ending Balances at Dec. 31, 2019	$ 35,466				$ 5	$ 18				$ 447,965				$ (9,043)	$ (405,504)	$ 2,025
Ending Balances (in shares) at Dec. 31, 2019					5,000,000	16,986,000