Consolidated Statements Of Operations And Comprehensive Loss (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Products and services revenue	$ 12,151,000	$ 12,580,000	$ 22,168,000	$ 23,422,000
License fees and royalty revenue	3,000	32,000	6,000	64,000
Net revenue	12,154,000	12,612,000	22,174,000	23,486,000
Cost of revenue	7,846,000	7,908,000	14,833,000	14,829,000
Gross profit	4,308,000	4,704,000	7,341,000	8,657,000
Operating expenses:
Sales and marketing	4,657,000	4,534,000	8,548,000	8,718,000
General and administrative	2,969,000	2,840,000	6,006,000	5,256,000
Engineering and development	1,361,000	1,810,000	2,650,000	3,239,000
Total operating expenses	8,987,000	9,184,000	17,204,000	17,213,000
Loss from operations	(4,679,000)	(4,480,000)	(9,863,000)	(8,556,000)
Gain (loss) on foreign currency transactions	(187,000)	217,000	20,000	216,000
Interest expense (income), net	(35,000)	10,000	(47,000)	19,000
Non-operating income (loss), net	(222,000)	227,000	(27,000)	235,000
Loss before income tax provision	(4,901,000)	(4,253,000)	(9,890,000)	(8,321,000)
Income tax provision	10,000	36,000	42,000	76,000
Net loss	(4,911,000)	(4,289,000)	(9,932,000)	(8,397,000)
Other comprehensive income item:
Foreign currency translation adjustment	(118,000)	157,000	(34,000)	187,000
Comprehensive loss	(5,029,000)	(4,132,000)	(9,966,000)	(8,210,000)
Net loss	(4,911,000)	(4,289,000)	(9,932,000)	(8,397,000)
Deemed dividend on convertible preferred stock		(3,978,000)		(3,978,000)
Net loss attributable to common stockholders	$ (4,911,000)	$ (8,267,000)	$ (9,932,000)	$ (12,375,000)
Net loss per share:
Basic	$ (0.24)	$ (0.61)	$ (0.48)	$ (0.91)
Diluted	$ (0.24)	$ (0.61)	$ (0.48)	$ (0.91)
Shares used in the calculation of net loss per share:
Basic	20,538	13,561	20,504	13,539
Diluted	20,538	13,561	20,504	13,539