Balance Sheet Components - Property and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Land, Property and Equipment
Total property and equipment at cost	$ 961,000	$ 948,000
Accumulated depreciation	(404,000)	(298,000)
Property and equipment, net	557,000	650,000
Depreciation and amortization expense	171,000	33,000
Land
Land, Property and Equipment
Total property and equipment at cost	396,000	396,000
Lab equipment
Land, Property and Equipment
Total property and equipment at cost	477,000	424,000
Clinical equipment
Land, Property and Equipment
Total property and equipment at cost		65,000
Software
Land, Property and Equipment
Total property and equipment at cost	63,000	$ 63,000
Furniture and fixtures
Land, Property and Equipment
Total property and equipment at cost	18,000
Computers and peripherals
Land, Property and Equipment
Total property and equipment at cost	$ 7,000