Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenue	$ 0	$ 23,000	$ 0	$ 173,000
Cost of revenue		15,000		223,000
Gross loss		8,000		(50,000)
Operating expenses:
Research and development	494,000	960,000	1,121,000	3,010,000
Sales and marketing	167,000	494,000	683,000	1,474,000
General and administrative	1,338,000	1,095,000	3,378,000	3,624,000
Total operating expenses	1,999,000	2,549,000	5,182,000	8,108,000
Loss from operations	(1,999,000)	(2,541,000)	(5,182,000)	(8,158,000)
Other income (expense):
Interest income	7,000	13,000	23,000	25,000
Interest expense	(201,000)	(82,000)	(489,000)	(100,000)
Foreign exchange gain (loss)	2,000		10,000	(6,000)
Other income				23,000
Re-measurement of warrant liability	10,000	7,000	13,000	(33,000)
Other income (expense), net	(182,000)	(62,000)	(443,000)	(91,000)
Loss before income tax expense	(2,181,000)	(2,603,000)	(5,625,000)	(8,249,000)
(Benefit from) Provision for income taxes	2,000	6,000	(1,000)	9,000
Net loss	$ (2,183,000)	$ (2,609,000)	$ (5,624,000)	$ (8,258,000)
Basic and diluted net loss per common share	$ (0.17)	$ (0.23)	$ (0.46)	$ (0.74)
Weighted-average number of common shares used in basic and diluted net loss per common share	12,691,797	11,157,489	12,279,294	11,143,773