Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Service revenue	$ 2,442	$ 2,015
Product revenue	366	279
Total revenue	2,808	2,294
Operating expenses:
Cost of service revenue	729	644
Cost of product revenue	187	108
Selling and marketing	829	662
General and administrative	945	1,171
Research and development	181	190
Total operating expenses	2,871	2,775
Loss from operations	(63)	(481)
Other income/(expense):
Interest income	2	3
Interest expense	(1)	(35)
Other income, net	3	2
Total other income/(expense), net	4	(30)
Loss before income tax	(59)	(511)
Income tax provision	(4)	(4)
Net loss	$ (63)	$ (515)
Net loss per common share:
Basic	$ (0.00)	$ (0.04)
Diluted	$ (0.00)	$ (0.04)
Weighted-average common shares outstanding:
Basic	14,287,734	13,699,389
Diluted	14,287,734	13,699,389