Note 1 - Organization and Nature of Operations - Consolidated Subsidiaries and VIEs (Details)	12 Months Ended
	Dec. 31, 2020
Business Opportunity Online [Member]
VIE, percentage of ownership	100.00%	[1]
Beijing CNET Online [Member]
VIE, percentage of ownership	100.00%	[1]
Beijing Chuang Fu Tian Xia [Member]
VIE, percentage of ownership	100.00%	[1]
Business Opportunity Online Hubei [Member]
VIE, percentage of ownership	100.00%	[1]
Beijing Chuang Shi Xin Qi [Member]
VIE, percentage of ownership	100.00%	[1]
Beijing Shi Ji Cheng Yuan [Member]
VIE, percentage of ownership	100.00%	[1],[2]
Beijing Hong Da Shi Xing [Member]
VIE, percentage of ownership	100.00%	[1]
ChinaNet Online Guangdong [Member]
VIE, percentage of ownership	100.00%	[1]
Qiweilian Guangzhou [Member]
VIE, percentage of ownership	51.00%	[1],[3]
ChinaNet BVI [Member]
Consolidated subsidiaries, percentage of ownership	100.00%	[4]
China Net HK [Member]
Consolidated subsidiaries, percentage of ownership	100.00%	[4]
ChinaNet Investment BVI [Member]
Consolidated subsidiaries, percentage of ownership	100.00%	[4]
Grandon BVI [Member]
Consolidated subsidiaries, percentage of ownership	100.00%	[4]
Winner Glory HK [Member]
Consolidated subsidiaries, percentage of ownership	100.00%
Rise King WFOE [Member]
Consolidated subsidiaries, percentage of ownership	100.00%	[4]
ChinaNet Online PRC [Member]
Consolidated subsidiaries, percentage of ownership	100.00%	[4]
Business Opportunity Chain [Member]
Consolidated subsidiaries, percentage of ownership	51.00%	[4]

[1] The Company's consolidated VIE, or a direct or indirect subsidiary of the Company's consolidated VIE.

[2] The Company sold this entity to unrelated parties in January 2021.

[3] The Company sold this entity to unrelated parties in March 2021.

[4] A direct or indirect subsidiary of the Company.