Balance Sheet Details - Schedule of Prepaid Expenses and PP&E (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Prepaid expenses and other current assets:
Prepaid insurance	$ 1,592	$ 951
Prepaid trade shows	24	85
Prepaid software development fees	214
Prepaid subscription fees	51	21
Other current assets		4
Total prepaid expenses and other current assets	1,881	1,061
Property and equipment, gross:
Laboratory equipment	2,021	1,135
Computer equipment	38	15
Furniture and fixtures	109	34
Leasehold improvements	678	32
Total property and equipment, gross	2,846	1,216
Less accumulated depreciation	(522)	(239)
Total property and equipment, net	$ 2,324	$ 977