Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Inventory Disclosure
Raw materials	$ 872	$ 872	$ 1,020
Sub-assemblies	1,219	1,219	1,379
Finished goods	1,155	1,155	1,342
Total inventory	3,246	3,246	3,741
Prepaid expenses and other current assets:
Prepaid insurance	149	149	110
Professional services	45	45
Patents	7	7	13
Prepaid advertising and marketing	35	35	41
Taxes	15	15	47
Other current assets	55	55	126
Total prepaid expenses and other current assets	306	306	337
Accrued and other liabilities:
Payroll and benefits	636	636	701
Accrued legal settlements			200
Customer deposits	723	723	639
Taxes	58	58	61
Accrued professional	431	431	155
Other liabilities	47	47	58
Total accrued and other liabilities	1,895	1,895	$ 1,814
Gain on extinguishment of debt	429	$ 429
Accounts payable
Accrued and other liabilities:
Write-off of the payables	$ 429