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Principles of Consolidation and Basis of Presentation (Details) - USD ($)
$ in Thousands
9 Months Ended
Nov. 14, 2018
Nov. 13, 2018
Aug. 31, 2020
Aug. 31, 2019
Oct. 15, 2020
Nov. 30, 2019
[1]
Jul. 28, 2017
Organization and Nature of Operations [Line Items]              
Accumulated deficit     $ 275,441     $ 291,513  
Cash flows used in operating activities     8,593 $ 8,493      
Cash and cash equivalents     19,054     24,283  
Certificates of deposit     $ 517     $ 511  
White Eagle | Lamington | Limited Partner              
Organization and Nature of Operations [Line Items]              
Ownership interest percentage   99.99%          
White Eagle | Lamington | Limited Partner | Subsidiaries              
Organization and Nature of Operations [Line Items]              
Ownership interest percentage 99.99% 99.99%          
WEGP | WEGP | General Partner              
Organization and Nature of Operations [Line Items]              
Ownership interest percentage   0.01%          
WEGP | WEGP | General Partner | Subsidiaries              
Organization and Nature of Operations [Line Items]              
Ownership interest percentage 0.01% 0.01%          
8.5% Senior Secured Notes              
Organization and Nature of Operations [Line Items]              
Debt interest rate     8.50% 8.50%   8.50% 8.50%
8.5% Senior Secured Notes | Senior Secured Notes              
Organization and Nature of Operations [Line Items]              
Debt interest rate     8.50%        
Debt outstanding principal becoming due on July 15, 2021     $ 47,600        
Subsequent Event              
Organization and Nature of Operations [Line Items]              
Cash and cash equivalents         $ 19,000    
Certificates of deposit         519    
Subsequent Event | 8.5% Senior Secured Notes | Senior Secured Notes              
Organization and Nature of Operations [Line Items]              
Debt outstanding principal becoming due on July 15, 2021         $ 47,600    
[1] Derived from audited consolidated financial statements.