UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue	$ 1,468	$ 2,192	$ 4,245	$ 6,085
Cost of revenue	324	995	967	2,814
Gross profit	1,144	1,197	3,278	3,271
Operating expenses:
Sales and marketing	1,357	1,711	4,518	4,485
Research and development	1,171	1,456	4,418	4,592
General and administrative	1,309	1,852	4,000	5,961
Operating loss	(2,693)	(3,822)	(9,658)	(11,767)
Interest and other income	2	2,002	43	2,004
Interest expense	(520)	(1,061)	(1,459)	(1,657)
Gain (loss) on lease termination	0	(35)	0	385
Net loss	$ (3,211)	$ (2,916)	$ (11,074)	$ (11,035)
Net loss per share:
Basic	$ (0.14)	$ (0.15)	$ (0.51)	$ (0.57)
Diluted	$ (0.14)	$ (0.15)	$ (0.51)	$ (0.57)
Weighted average common shares outstanding:
Basic	23,061	19,826	21,844	19,433
Diluted	23,061	19,826	21,844	19,433