Note 8 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, plant and equipment, gross	$ 25,046	$ 22,222
Accumulated depreciation and amortization	(16,087)	(12,680)
Property and equipment, net	8,959	9,542
Machinery, Manufacturing and Demonstration Equipment [Member]
Property, plant and equipment, gross	9,089	8,450
Operating Lease Assets [Member]
Property, plant and equipment, gross	12,848	10,251
Computer Equipment [Member]
Property, plant and equipment, gross	603	600
Furniture and Fixtures [Member]
Property, plant and equipment, gross	715	831
Leasehold Improvements [Member]
Property, plant and equipment, gross	1,721	1,654
Construction in Progress [Member]
Property, plant and equipment, gross	$ 70	$ 436