CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	3VR Security	Thursby Sofware Systems	Series B Preferred Stock	Common Stock	Common Stock 3VR Security	Common Stock Thursby Sofware Systems	Additional Paid-in Capital	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, 2016	$ 3,933				$ 11			$ 400,266			$ (6,708)	$ (391,509)	$ 2,053	$ (180)
Beginning Balances (in shares) at Dec. 31, 2016					11,109,000
Net loss	(8,152)											(8,138)		(14)
Unrealized income (loss) from foreign currency translation adjustments	638												622	16
Issuance of Series B preferred stock,net of issuance costs	11,878			$ 3				11,875
Issuance of Series B preferred stock, net of issuance costs (shares)				3,000,000
Issuance of common stock in connection with public offering	12,560				$ 3			12,557
Issuance of common stock in connection with public offering (shares)					2,845,000
Issuance of warrants	2,319							2,319
Issuance of common stock in connection with vesting of stock awards	1				$ 1
Issuance of common stock in connection with vesting of stock awards (shares)					604,000
Stock-based compensation	2,480							2,480
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(777)										(777)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)					(178,000)
Issuance of shares to non-employees	255							255
Issuance of shares to non-employees (shares)					56,000
Cancellation of reacquired warrants from extinguishment of debt	(1,282)							(1,282)
Ending Balances at Dec. 31, 2017	23,853			$ 3	$ 15			428,470			(7,485)	(399,647)	2,675	(178)
Ending 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 (Note 1) | 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)	2,500				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