Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Reconciliation of New Tax Rate (Details)

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Income Taxes - Reconciliation of New Tax Rate (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Aug. 31, 2018
Feb. 28, 2018
Aug. 31, 2017
Aug. 31, 2018
Aug. 31, 2017
Nov. 30, 2017
Income Tax Contingency [Line Items]            
Federal rate 21.00%   34.00% 21.00% 34.00%  
State rate, net of federal tax benefit 3.13%   2.90% 3.13% 2.90%  
Total   24.13%   24.13%   36.45%
Previous Rate            
Income Tax Contingency [Line Items]            
Federal rate       34.00%    
State rate, net of federal tax benefit       2.45%    
Total       36.45%