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Income Taxes (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2021
Sep. 30, 2020
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2020
Operating Loss Carryforwards [Line Items]            
Effective income tax rate percentage 33.00%   (100.00%) 9.00% 24.00% 18.90%
Income tax expense (benefit) $ 1,496   $ (326) $ 1,132 $ 787  
Profit before tax 4,500   $ 300 12,100 $ 3,400  
UK tax expense on pre-tax income       $ 4,100    
Effective UK tax rate on pre-tax income       34.00%    
Possible reduction in long-term tax obligations $ 100     $ 100    
Tax Years 2019 and 2020            
Operating Loss Carryforwards [Line Items]            
Income tax expense (benefit)   $ (2,700)   (2,700)    
Foreign Tax Authority | Her Majesty's Revenue and Customs (HMRC)            
Operating Loss Carryforwards [Line Items]            
Effect of increase in UK corporate tax rate       $ (200)