Property and Equipment Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 24,058	$ 23,446
Accumulated depreciation and amortization	(11,850)	(9,579)
Total property and equipment, net	12,208	13,867
Construction-in-progress
Property, Plant and Equipment [Line Items]
Total property and equipment, gross		292
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	3,987	3,446
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	3,828	3,425
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	2,065	2,065
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	12,814	12,802
Consigned equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 1,364	$ 1,416