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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Nov. 30, 2018
Nov. 30, 2017
Aug. 31, 2019
Aug. 31, 2018
Dec. 31, 2017
Income Taxes [Line Items]          
Federal statutory income tax rate       25.70% 35.00%
Income tax expense $ 100 $ (1,348)      
Pre-tax loss $ (1,257) $ (3,740)      
Negative effective tax benefit rate affected by GILTI (8.00%)        
GILTI tax expense $ 100        
Scenario, Forecast [Member]          
Income Taxes [Line Items]          
Federal statutory income tax rate     21.00%