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v3.22.4

Other income net (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥)
Exchange gain / (loss), net | $ | $ 77,000 |  | $ 101,000 |  | $ (30,000) |
Rental income | $ | 50,000 |  | 59,000 |  | 82,000 |
Government subsidies - Employment Support Scheme | $ | 0 |  | 147,000 |  | 0 |
Other income, net | $ | 127,000 |  | 307,000 |  | 52,000 |
Other income | $ | $ 127,000 |  | $ 307,000 |  | $ 52,000 |
ZHEJIANG TIANLAN |  |  |  |  |  |
Compensation income |  | ¥ 0 |  | ¥ 22,548,000 |  | ¥ 0
Gain on disposal of property, plant and equipment |  | 39,000 |  | 0 |  | 39,000
Investment income |  | 531,000 |  | 266,000 |  | 0
Amounts waived by payees |  | 3,061,000 |  | 4,535,000 |  | 280,000
Reversal of allowance for doubtful accounts |  | 183,000 |  | 6,463,000 |  | 0
Subsidy income from PRC government |  | 7,780,000 |  | 5,834,000 |  | 5,957,000
Other income |  | 11,594,000 |  | 39,646,000 |  | 6,276,000
Bad debts written off |  | 0 |  | 0 |  | 5,383,000
Impairment loss on contract assets |  | 1,238,000 |  | 1,399,000 |  | 0
Impairment loss on long-term investments |  | 0 |  | 1,340,000 |  | 0
Impairment loss on property, plant and equipment |  | 0 |  | 2,742,000 |  | 0
Investment loss |  | 0 |  | 0 |  | 241,000
Other losses |  | ¥ 1,238,000 |  | ¥ 5,481,000 |  | ¥ 5,624,000

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