Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Total revenue	$ 23,990	$ 22,987
Cost of revenue:
Total cost of revenue	7,934	8,036
Gross profit	16,056	14,951
Operating expenses:
Sales and marketing	18,845	19,875
Research, development and engineering	17,314	16,467
General and administrative	12,710	12,340
Total operating expenses	48,869	48,682
Operating loss	(32,813)	(33,731)
Other income, net	277	912
Loss before income taxes	(32,536)	(32,819)
Provision for income taxes	(1)	(21)
Net loss	(32,537)	(32,840)
Beneficial conversion feature	(11,443)	0
Net loss attributable to common shares	$ (43,980)	$ (32,840)
Earnings (loss) per common share:
Loss per common share — basic	$ (3.41)	$ (2.79)
Loss per common share — diluted	$ (3.41)	$ (2.79)
Weighted average common shares outstanding — basic	12,906	11,762
Weighted average common shares outstanding — diluted	12,906	11,762
Service [Member]
Revenue:
Total revenue	$ 13,881	$ 13,249
Cost of revenue:
Total cost of revenue	5,827	6,013
Subscription [Member]
Revenue:
Total revenue	10,109	9,738
Cost of revenue:
Total cost of revenue	$ 2,107	$ 2,023