Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Comprehensive Deficit [Member]
BALANCE at Dec. 31, 2014	$ 14,902		$ 45	$ 223,141	$ (208,284)
BALANCE, Shares at Dec. 31, 2014			45,000,000
Exercise of common stock options	$ 10			10
Exercise of common stock options, shares	2,000		8,000
Non-cash compensation recognized on stock options and ESPP	$ 186			186
Restricted stock grants, net of cancellations	1,967		$ 1	1,966
Restricted stock grants, net of cancellations, shares			1,091,000
Cancellation of shares for payment of withholding tax	(458)			(458)
Cancellation of shares for payment of withholding tax, shares			(394,000)
Tax benefit deficiencies related to restricted stock expense	5			5
Employee stock purchase plan	17			17
Employee stock purchase plan, shares			24,000
Comprehensive loss	(2,603)				(2,603)
BALANCE at Dec. 31, 2015	14,026		$ 46	224,867	(210,887)
BALANCE, Shares at Dec. 31, 2015			45,729,000
Non-cash compensation recognized on stock options and ESPP	137			137
Restricted stock grants, net of cancellations	1,391			1,391
Restricted stock grants, net of cancellations, shares			366,000
Cancellation of shares for payment of withholding tax	(304)			(304)
Cancellation of shares for payment of withholding tax, shares			(126,000)
Employee stock purchase plan	13			13
Employee stock purchase plan, shares			7,000
Shares issued for iMobileMagic acquisition	1,737			1,737
Shares issued for iMobileMagic acquisition, shares			611,000
Shares issued for interest on notes payable	17			17
Shares issued for interest on notes payable, shares			8,000
Effects of reverse stock split	(3)		$ (34)	31
Effects of reverse stock split, shares			(34,297,000)
Issuance of warrants in stock offering	1,386			1,386
Comprehensive loss	(15,341)				(15,341)
BALANCE at Dec. 31, 2016	$ 3,059		$ 12	229,275	(226,228)
BALANCE, Shares at Dec. 31, 2016	12,297,954		12,298,000
Non-cash compensation recognized on stock options and ESPP	$ 44			44
Restricted stock grants, net of cancellations	1,127			1,127
Restricted stock grants, net of cancellations, shares			(69,000)
Cancellation of shares for payment of withholding tax	(171)			(171)
Cancellation of shares for payment of withholding tax, shares			(126,000)
Employee stock purchase plan	3			3
Employee stock purchase plan, shares			4,000
Preferred shares issued in stock offering,net of offering costs	5,213			5,213
Preferred shares issued in stock offering, net of offering costs, shares		3,000
Common shares issued in stock offering,net of offering costs	1,992		$ 2	1,990
Common shares issued in stock offering, net offering costs, shares			2,162,000
Issuance of warrants in stock offering	64			64
Preferred shares issued with debtconversion	(103)			(103)
Preferred shares issued with debt conversion, shares		3,000
Warrant repricing				44	(44)
Comprehensive loss	(6,661)				(6,661)
BALANCE at Dec. 31, 2017	$ 4,567		$ 14	$ 237,486	$ (232,933)
BALANCE, Shares at Dec. 31, 2017	5,500	6,000
BALANCE, Shares at Dec. 31, 2017	14,268,765		14,269,000