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Note 7 - Investment Properties (Details Textual)
¥ in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 10, 2022
USD ($)
Feb. 10, 2022
CNY (¥)
Aug. 31, 2022
USD ($)
Aug. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2010
USD ($)
Jun. 30, 2010
CNY (¥)
Dec. 31, 2022
CNY (¥)
Jun. 30, 2022
USD ($)
Jun. 30, 2022
CNY (¥)
Mar. 31, 2010
USD ($)
Mar. 31, 2010
CNY (¥)
Jun. 30, 2008
USD ($)
Jun. 30, 2008
CNY (¥)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land         $ 894   $ 894       ¥ 5,554 $ 894 ¥ 5,554        
Operating Lease, Lease Income, Total         2                        
TTCQ [Member]                                  
Lease, Operating Lease, Number of Properties                           2 2    
Area of Real Estate Property (Square Metre) | m²                           311.99 311.99    
Purchase Obligation, Total                           $ 648 ¥ 4,025    
Mao Ye [Member]                                  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land                               $ 894 ¥ 5,554
Monthly Lease Revenue Amount $ 2 ¥ 15                              
Operating Lease, Lease Income, Total           $ 2 8 $ 4                  
Depreciation, Total         4 4 8 8                  
Jiang Huai [Member]                                  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land         580   580       3,600 580 3,600        
Depreciation, Total         7 7 14 14                  
Payments to Acquire Projects                 $ 580 ¥ 3,600              
FuLi [Member]                                  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land         648   648       ¥ 4,025 $ 648 ¥ 4,025        
Monthly Lease Revenue Amount     $ 1 ¥ 6                          
Operating Lease, Lease Income, Total         2 5 4 14                  
Depreciation, Total         7 8 15 16                  
CHINA                                  
Operating Lease, Lease Income, Total         4 8 12 19                  
Depreciation, Total         $ 18 $ 19 $ 36 $ 38