Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Service revenue	$ 3,147	$ 2,540	$ 6,155	$ 4,982
Product revenue	467	437	951	803
Total revenue	3,614	2,977	7,106	5,785
Operating expenses:
Cost of service revenue	874	731	1,751	1,460
Cost of product revenue	243	201	492	388
Selling and marketing	963	767	1,862	1,596
General and administrative	997	1,034	2,011	1,979
Research and development	197	194	409	375
Total operating expenses	3,274	2,927	6,525	5,798
Income/(loss) from operations	340	50	581	(13)
Other income/(expense):
Interest income	2	2	3	4
Interest expense	(3)	(2)	(8)	(3)
Other income, net	3	0	8	3
Total other income, net	2	0	3	4
Income/(loss) before income tax	342	50	584	(9)
Income tax provision	(4)	(3)	(7)	(7)
Net income/(loss)	$ 338	$ 47	$ 577	$ (16)
Earnings/(loss) per common share:
Basic	$ 0.02	$ .00	$ 0.04	$ (0.00)
Diluted	$ 0.02	$ .00	$ 0.04	$ (0.00)
Weighted-average common shares outstanding:
Basic	14,462,722	14,299,638	14,428,694	14,293,658
Diluted	15,508,570	15,147,255	15,339,404	14,293,658