Note 7 - Prepayments and Deposit to Suppliers (Details Textual)	9 Months Ended	12 Months Ended
Sep. 30, 2017	Dec. 31, 2016
Number of Largest Internet Resources Suppliers	2	2

Represents the number of company's largest resources suppliers.

No definition available.

Name:	cnet_NumberOfLargestInternetResourcesSuppliers
Namespace Prefix:	cnet_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration