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Accounts receivable, net (Details 2) ¥ in Thousands, $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)
Accounts receivable	$ 3,199		$ 3,586
ZHEJIANG TIANLAN
Accounts receivable | ¥		¥ 118,621		¥ 138,778
Current
Accounts receivable	2,014		1,495
1 - 30 Days Past Due
Accounts receivable	85		41
31 - 60 Days Past Due
Accounts receivable	202		1,343
61 - 90 Days Past Due
Accounts receivable	41		99
Greater Than or Equal to 91 Days
Accounts receivable	857		608
Past Due
Accounts receivable	$ 1,185		$ 2,091
Within 1 Year | ZHEJIANG TIANLAN
Accounts receivable | ¥		76,590		96,456
1 year - 2 Years | ZHEJIANG TIANLAN
Accounts receivable | ¥		31,389		30,252
2 Years - 3 Years | ZHEJIANG TIANLAN
Accounts receivable | ¥		6,128		6,260
3 Years - 4 Years | ZHEJIANG TIANLAN
Accounts receivable | ¥		3,678		5,179
4 Years - 5 Years | ZHEJIANG TIANLAN
Accounts receivable | ¥		¥ 836		¥ 631

X

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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