Plant, Equipment, Leasehold Improvements and Operating Lease Right-of-Use Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	$ 131,072	$ 129,489
Less accumulated depreciation and amortization	(70,039)	(66,436)
Total property, equipment and leasehold improvements, net	61,033	63,053
Machinery and equipment
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	68,466	67,506
Machinery and equipment under financing leases
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	23,774	23,774
Furniture, fixtures and computer equipment
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	160	107
Leasehold improvements
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	17,419	16,335
Construction in progress
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	1,264	1,778
Operating lease right-of-use assets
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	$ 19,989	$ 19,989