Note 6 - Property and Equipment - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 18,167	$ 16,827
Less accumulated depreciation and amortization	(9,550)	(8,113)
Property and equipment, net	8,617	8,714
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	1,308	1,122
Office equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	633	467
Software
Property, Plant and Equipment [Line Items]
Total property and equipment	1,501	1,159
Laboratory equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	4,588	4,247
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 10,137	$ 9,832