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Note 15 - Payable For Acquisition of Noncontrolling Interest (Details Textual) - Acquisition of Chuang Fu Tian Xi [Member]
$ in Thousands, ¥ in Millions
1 Months Ended 6 Months Ended
Aug. 31, 2018
USD ($)
Aug. 31, 2018
CNY (¥)
Jul. 31, 2018
USD ($)
Jul. 31, 2018
CNY (¥)
Mar. 31, 2018
USD ($)
Mar. 31, 2018
CNY (¥)
Jun. 30, 2018
USD ($)
Jun. 30, 2018
CNY (¥)
Business Acquisition, Percentage of Voting Interests Acquired         49.00% 49.00%    
Business Combination, Consideration Transferred, Total         $ 2,300 ¥ 15.0    
Business Combination, Percentage of Consideration Paid in Cash         50.00% 50.00%    
Business Combination, Percentage of Consideration Paid in Common Stock         50.00% 50.00%    
Payments to Acquire Businesses, Gross             $ 1,100 ¥ 7.5
Scenario, Forecast [Member]                
Payments to Acquire Businesses, Gross $ 230 ¥ 1.5            
Subsequent Event [Member]                
Business Acquisition, Percentage of Voting Interests Acquired     49.00% 49.00%        
Business Combination, Consideration Transferred, Total       ¥ 12.5        
Payments to Acquire Businesses, Gross     $ 530 3.5        
Business Combination, Consideration Transferred, Change of Unpaid Consideration from Common Stock to Cash     $ 760 ¥ 5.0