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v3.22.1

Summary of significant accounting policies (Details Narrative) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) shares | Dec. 31, 2021 CNY (¥) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2020 CNY (¥) shares | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Mar. 03, 2021 shares | Oct. 08, 2019 shares
Research and development costs | $ 61,000 |  | $ 497,000 |  | $ 35,000 |  |  |
Advertising and promotional expenses | 7,000 |  | 7,000 |  | $ 13,000 |  |  |
Unrecognized contract revenue | $ 5,400,000 |  | $ 11,581,000 |  |  |  |  |
Shares issued | shares | 5,322,459 | 5,322,459 | 3,260,559 | 3,260,559 |  |  | 2,061,900 | 1,030,950
Accounts Receivable |  |  |  |  |  |  |  |
Concentration percentage | 10.00% | 10.00% |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |
Concentration percentage | 15.00% | 15.00% | 23.00% | 23.00% | 34.00% | 34.00% |  |
ZHEJIANG TIANLAN |  |  |  |  |  |  |  |
Research and development costs | ¥ |  | ¥ 23,419,000 |  | ¥ 28,589,000 |  | ¥ 19,018,000 |  |
Shares issued | shares | 82,572,000 | 82,572,000 | 82,572,000 | 82,572,000 |  |  |  |
Impairment of long-lived assets | ¥ |  | ¥ 0 |  | ¥ 2,742,000 |  | ¥ 0 |  |
ZHEJIANG TIANLAN | Accounts Receivable |  |  |  |  |  |  |  |
Concentration percentage | 10.00% | 10.00% |  |  |  |  |  |
ZHEJIANG TIANLAN | Revenue |  |  |  |  |  |  |  |
Concentration percentage | 35.00% | 35.00% | 39.00% | 39.00% | 40.00% | 40.00% |  |
ZHEJIANG TIANLAN | Revenue | Customer One |  |  |  |  |  |  |  |
Concentration percentage | 16.00% | 16.00% | 16.00% | 16.00% | 17.00% | 17.00% |  |

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