Plant, Equipment, Leasehold Improvements and Operating Lease Right-of-Use Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	$ 129,080	$ 119,100
Less accumulated depreciation and amortization	(66,437)	(61,922)
Total property, equipment and leasehold improvements, net	62,643	57,178
Machinery and equipment
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	65,846	64,786
Machinery and equipment under financing leases
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	21,205	15,717
Furniture, fixtures and computer equipment
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	2,357	3,072
Leasehold improvements
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	15,480	14,703
Construction in progress
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	4,511	3,304
Operating lease right-of-use assets
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	$ 19,681	$ 17,518