Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Total revenue	$ 6,189	$ 5,660
Cost of revenue:
Total cost of revenue	2,198	2,134
Gross profit	3,991	3,526
Operating expenses:
Sales and marketing	5,246	4,950
Research, development and engineering	4,433	4,038
General and administrative	3,367	3,210
Total operating expenses	13,046	12,198
Operating loss	(9,055)	(8,672)
Other income, net	142	237
Loss before income taxes	(8,913)	(8,435)
Benefit (provision) for income taxes	5	(28)
Net loss	$ (8,908)	$ (8,463)
Earnings (loss) per common share:
Loss per common share — basic	$ (0.74)	$ (0.74)
Loss per common share — diluted	$ (0.74)	$ (0.74)
Weighted average common shares outstanding — basic	12,037	11,487
Weighted average common shares outstanding — diluted	12,037	11,487
Service [Member]
Revenue:
Total revenue	$ 3,738	$ 3,814
Cost of revenue:
Total cost of revenue	1,684	1,645
Subscription [Member]
Revenue:
Total revenue	2,451	1,846
Cost of revenue:
Total cost of revenue	$ 514	$ 489