Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenues	$ 10,930	$ 12,735
Cost of revenues (including depreciation of $14 and $32 in 2023 and 2022, respectively)	3,282	3,637
Gross profit	7,648	9,098
Operating expenses:
Selling and marketing	3,554	2,981
Research and development	5,868	7,265
General and administrative	3,475	3,923
Depreciation and amortization	1,686	1,967
Total operating expenses	14,583	16,136
Operating loss	(6,935)	(7,038)
Other income (expense):
Change in fair value of warrant and derivative liabilities	2,984	0
Loss on derecognition of debt	(627)	0
Interest expense, net	(2,260)	(4)
Other (expense) income, net	(40)	59
Loss before provision for income taxes	(6,878)	(6,983)
Provision for income tax expense	9	19
Net loss	$ (6,887)	$ (7,002)
Loss per share:
Basic (in dollars per share)	$ (0.11)	$ (0.13)
Diluted (in dollars per share)	$ (0.11)	$ (0.13)
Weighted average shares outstanding:
Basic (in shares)	61,646	54,501
Diluted (in shares)	61,646	54,501