v3.26.1
Note 11 - Joint Venture (Details Textual) - CNNC High Energy Equipment [Member] - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Jan. 31, 2019
Equity Method Investment, Ownership Percentage 49.00%   49.00%   49.00%
Equity Method Investments $ 300 $ 400 $ 300 $ 400  
Proceeds from Equity Method Investment, Distribution $ 1,400 $ 2,500      
Equity Method Investment, Other-than-Temporary Impairment     $ 0 $ 0