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Stock-based Compensation (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2019
shares
Jan. 31, 2020
$ / shares
shares
Sep. 30, 2019
$ / shares
shares
Apr. 30, 2014
shares
Feb. 29, 2020
USD ($)
item
shares
Feb. 28, 2019
USD ($)
shares
Feb. 29, 2020
USD ($)
item
shares
Feb. 28, 2019
USD ($)
shares
Stock-based Compensation                
Number of share-based compensation plans | item         1   1  
Additional number of shares authorized for issuance 500,000     250,000        
Plan expiration date Nov. 03, 2023              
Maximum grant limit per employee per one year period 35,000              
Shares of common stock reserved for issuance         1,021,000 521,000 1,021,000 521,000
Common stock available for future issuance (in shares)         548,000 189,000 548,000 189,000
Share-based Compensation, Forfeiture Method [Fixed List]             Estimating expected forfeitures  
Estimated forfeiture rate (as a percent)         0.00%   0.00%  
Stock-based compensation expense | $         $ 24 $ 47 $ 59 $ 90
Cost of revenues                
Stock-based Compensation                
Stock-based compensation expense | $         6 13 17 24
Research and development                
Stock-based Compensation                
Stock-based compensation expense | $         5 8 11 15
Selling, general and administrative                
Stock-based Compensation                
Stock-based compensation expense | $         $ 13 $ 26 $ 31 $ 51
Maximum                
Stock-based Compensation                
Vesting period             1 year  
Officer and Employees | Restricted stock unit                
Stock-based Compensation                
Stock units granted (in shares)   136,000            
Vesting percentage per anniversary of the vesting start date   25.00%            
Grant-date fair value (in dollars per share) | $ / shares   $ 2.39            
Directors | Restricted stock unit | July Thirty One Two Thousand Twenty Member                
Stock-based Compensation                
Stock units granted (in shares)     5,000          
Grant-date fair value (in dollars per share) | $ / shares     $ 2.45          
Vesting percentage     100.00%          
Directors | Restricted stock unit | Earlier of September 5, 2020 and the date of 2020 annual meeting                
Stock-based Compensation                
Stock units granted (in shares)     2,500          
Grant-date fair value (in dollars per share) | $ / shares     $ 2.45          
Vesting percentage     100.00%