Plant, Equipment, Leasehold Improvements and Operating Lease Right-of-Use Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	$ 144,282,000	$ 129,489,000
Less accumulated depreciation and amortization	(75,634,000)	(66,436,000)
Total plant, equipment, leasehold improvements and operating lease right-of-use assets, net	68,648,000	63,053,000
Impairments of the Company's plant, equipment, and leasehold improvement assets	0	0
Machinery and equipment
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	71,781,000	67,506,000
Machinery and equipment under financing leases
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	32,272,000	23,774,000
Furniture, fixtures and computer equipment
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	1,123,000	107,000
Leasehold improvements
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	18,875,000	16,335,000
Construction in progress
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	5,141,000	1,778,000
Operating lease right-of-use assets
Plant, Equipment and Leasehold Improvements
Plant, equipment and leasehold improvements, gross	$ 15,090,000	$ 19,989,000