Consolidated Statements Of Operations And Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net revenue	$ 8,646	$ 10,936	$ 27,617	$ 33,110
Cost of revenue	5,677	6,995	17,746	21,828
Gross profit	2,969	3,941	9,871	11,282
Operating expenses:
Sales and marketing	3,515	4,489	10,665	13,037
General and administrative	3,210	2,685	8,114	8,691
Engineering and development	1,126	1,277	3,665	3,927
Total operating expenses	7,851	8,451	22,444	25,655
Loss from operations	(4,882)	(4,510)	(12,573)	(14,373)
Loss on foreign currency transactions	19	73	68	53
Interest expense	551	33	1,559	80
Non-operating loss, net	570	106	1,627	133
Loss before income tax provision	(5,452)	(4,616)	(14,200)	(14,506)
Income tax provision	26	49	68	91
Net loss	(5,478)	(4,665)	(14,268)	(14,597)
Other comprehensive income item:
Foreign currency translation adjustment	(128)	3	(170)	(31)
Comprehensive loss	(5,606)	(4,662)	(14,438)	(14,628)
Net loss attributable to common stockholders	$ (5,478)	$ (4,665)	$ (14,268)	$ (14,597)
Net loss per share:
Basic	$ (0.25)	$ (0.23)	$ (0.66)	$ (0.71)
Diluted	$ (0.25)	$ (0.23)	$ (0.66)	$ (0.71)
Shares used in the calculation of net loss per share:
Basic	21,898	20,610	21,545	20,539
Diluted	21,898	20,610	21,545	20,539