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Income taxes (Details 2) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Tax losses | $ 614,000 | $ 649,000
Temporary differences | 0 | (3,000)
Less: valuation allowances | (541,000) | (469,000)
Net deferred tax assets / (liabilities) | 108,000 | 142,000
Total deferred tax assets | 108,000 | 145,000
ZHEJIANG TIANLAN |  |
Tax losses | 2,854,000 | 594,000
Allowance for doubtful accounts | 5,680 | 6,188
Deferred government grant | 154 | 583
Impairment losses on assets | 5,978 | 6,940
Total deferred tax assets | $ 14,666 | $ 14,305

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