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Leases - Supplemental balance sheet information (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Operating leases |  |
Operating lease right-of-use assets | $ 3,208,000 | $ 4,010,000
Operating lease liabilities - current | 1,202,000 | 1,118,000
Operating lease liabilities - long-term | 2,363,000 | 3,331,000
Total operating lease liabilities | 3,565,000 | 4,449,000
Finance leases |  |
Property and equipment, at cost | 10,672,000 | 8,942,000
Accumulated depreciation | (7,982,000) | (7,336,000)
Property and equipment, net | $ 2,690,000 | $ 1,606,000
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization | Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Finance lease liabilities - current | $ 470,000 | $ 70,000
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Long-term Debt and Capital Lease Obligations, Current | Long-term Debt and Capital Lease Obligations, Current
Finance lease liabilities - long-term | $ 1,289,000 | $ 207,000
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Long-term Debt and Capital Lease Obligations | Long-term Debt and Capital Lease Obligations
Obligations under finance leases | $ 1,759,000 | $ 277,000
Weighted average remaining lease term: |  |
Operating leases | 3 years 1 month 6 days | 3 years 10 months 24 days
Finance leases | 3 years 2 months 12 days | 2 years 9 months 18 days
Weighted average discount rate: |  |
Operating leases | 5.20% | 5.03%
Finance leases | 6.60% | 7.21%

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