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Lease obligations (Details 2) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Weighted average remaining lease term : Operating leases | 20 years | 23 years
Operating lease right-of-use assets | $ 219,000 | $ 238,000
Current portion of long-term operating lease obligations | 113,000 | 175,000
Long-term operating lease obligations, net of current maturities | 87,000 | 41,000
Total operating lease liabilities | $ 200,000 | $ 216,000
Weighted average discount rate : operating leases | 4.44% | 5.00%
ZHEJIANG TIANLAN |  |
Property, plant and equipment, at cost | $ 0 | $ 0
Accumulated depreciation and impairment losses | 0 | 0
Property, plant and equipment, net | 0 | 0
Current maturities of long-term debt | 0 | 0
Total finance lease liabilities | $ 0 | $ 0
Weighted average discount rate : Finance leases | 0.00% | 5.90%

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