Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue:
Total revenue	$ 6,417	$ 5,751	$ 19,395	$ 18,437
Cost of revenue:
Total cost of revenue	2,197	1,928	6,607	6,239
Gross profit	4,220	3,823	12,788	12,198
Operating expenses:
Sales and marketing	4,647	4,538	15,865	14,417
Research, development and engineering	4,586	4,662	12,930	13,303
General and administrative	2,943	3,009	15,611	9,457
Total operating expenses	12,176	12,209	44,406	37,177
Operating loss	(7,956)	(8,386)	(31,618)	(24,979)
Other income:
Gain on extinguishment of note payable	5,094	0	5,094	0
Other income (loss)	(2)	36	26	257
Other income, net	5,092	36	5,120	257
Loss before income taxes	(2,864)	(8,350)	(26,498)	(24,722)
Benefit (provision) for income taxes	(7)	(2)	(17)	1
Net loss	$ (2,871)	$ (8,352)	$ (26,515)	$ (24,721)
Earnings (loss) per common share:
Loss per common share — basic	$ (0.17)	$ (0.68)	$ (1.61)	$ (2.04)
Loss per common share — diluted	$ (0.17)	$ (0.68)	$ (1.61)	$ (2.04)
Weighted average common shares outstanding — basic	16,520	12,241	16,428	12,129
Weighted average common shares outstanding — diluted	16,520	12,241	16,428	12,129
Service [Member]
Revenue:
Total revenue	$ 3,932	$ 3,352	$ 11,507	$ 10,982
Cost of revenue:
Total cost of revenue	1,630	1,406	4,715	4,691
Subscription [Member]
Revenue:
Total revenue	2,485	2,399	7,888	7,455
Cost of revenue:
Total cost of revenue	$ 567	$ 522	$ 1,892	$ 1,548