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Note 8 - Other Assets (Details Textual)
¥ in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Dec. 02, 2010
CNY (¥)
Jun. 30, 2021
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2022
CNY (¥)
Jun. 30, 2022
USD ($)
Jun. 30, 2022
CNY (¥)
Oct. 02, 2013
USD ($)
Oct. 02, 2013
CNY (¥)
Dec. 02, 2010
USD ($)
Dec. 02, 2010
CNY (¥)
Payments to Acquire Investments, Total ¥ 10,000   $ 2,275 $ 320              
Percentage of Investment               10.00% 10.00% 10.00% 10.00%
Management Fee Paid | ¥ ¥ 5,000                    
Management Fee Payable     803   ¥ 5,000           ¥ 5,000
Loss On Joint Venture     (22)   (137)         $ 22 ¥ 137
Investments, Total     803   5,000     $ 803 ¥ 5,000    
Loans and Leases Receivable, Related Parties, Ending Balance     814   5,000 $ 814 ¥ 5,000        
Interest Receivable     200   1,250 200 1,250        
Impairment of Interest     $ 150   ¥ 906 $ 150 ¥ 906        
Asset Impairment Charges, Total | $   $ 1,580