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Note 8 - Long-term Investments (Details Textual)
¥ in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Jan. 31, 2019
USD ($)
Jan. 31, 2019
CNY (¥)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2017
USD ($)
Oct. 31, 2018
USD ($)
Oct. 31, 2018
CNY (¥)
Dec. 31, 2015
USD ($)
Investments, Cash Returned     $ 437   $ 459      
Local Chain Xi’an [Member]                
Common Stock, Value, Outstanding           $ 730 ¥ 5,000  
Shenzhen Mingshan and Zhao Shang Ke Hubei [Member]                
Equity Method Investment, Ownership Percentage     23.18% 23.18% 25.50%      
Equity Method Investments               $ 0
ChinaNet Chuang Tou [Member]                
Equity Securities without Readily Determinable Fair Value, Percent     19.00% 19.00%        
Investments, Cash Returned     $ 437 ¥ 3,000 $ 459      
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount     $ 450          
ChinaNet Korea [Member]                
Equity Securities without Readily Determinable Fair Value, Percent     15.00% 15.00%        
Equity Securities without Readily Determinable Fair Value, Amount         0      
Beijing Saturday [Member]                
Equity Securities without Readily Determinable Fair Value, Percent     10.00% 10.00%        
Investments, Cash Returned            
Equity Securities without Readily Determinable Fair Value, Amount         0      
Local Chain Xi’an [Member]                
Equity Securities without Readily Determinable Fair Value, Percent     4.90% 4.90%   4.90% 4.90%  
Local Chain Xi’an [Member] | Subsequent Event [Member]                
Payments to Acquire Investments, Total $ 40 ¥ 250            
Chuangshi Meiwei [Member]                
Equity Securities without Readily Determinable Fair Value, Amount         0      
Guohua Shiji and Beijing Saturday [Member]                
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount         $ 40      
Shenzhen Mingshan [Member]                
Equity Method Investment, Ownership Percentage         23.18%      
Zhao Shang Ke Hubei [Member]                
Equity Method Investment, Ownership Percentage         25.50%      
Guohua Shiji [Member]                
Investments, Cash Returned            
Equity Securities without Readily Determinable Fair Value, Amount         $ 0