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Stock-based Compensation (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2014
Feb. 28, 2014
item
Feb. 28, 2013
Feb. 28, 2014
item
Feb. 28, 2013
Feb. 28, 2014
Less than or equal to
Feb. 28, 2014
Common Stock
Aug. 31, 2013
Common Stock
Aug. 31, 2013
Executives and employees
Stock options
Aug. 31, 2013
Executives and employees
Restricted stock unit
Aug. 31, 2013
Executives and employees
Stock options and stock units
Feb. 28, 2013
Directors
Restricted stock unit
Feb. 28, 2014
Employees, officers, directors and consultants
Cost of revenues
Feb. 28, 2013
Employees, officers, directors and consultants
Cost of revenues
Feb. 28, 2014
Employees, officers, directors and consultants
Cost of revenues
Feb. 28, 2013
Employees, officers, directors and consultants
Cost of revenues
Feb. 28, 2014
Employees, officers, directors and consultants
Research and development
Feb. 28, 2013
Employees, officers, directors and consultants
Research and development
Feb. 28, 2014
Employees, officers, directors and consultants
Research and development
Feb. 28, 2013
Employees, officers, directors and consultants
Research and development
Feb. 28, 2014
Employees, officers, directors and consultants
Selling, general and administrative
Feb. 28, 2013
Employees, officers, directors and consultants
Selling, general and administrative
Feb. 28, 2014
Employees, officers, directors and consultants
Selling, general and administrative
Feb. 28, 2013
Employees, officers, directors and consultants
Selling, general and administrative
Stock-based Compensation                                                
Number of share-based compensation plans   1   1                                        
Stock-based Compensation                                                
Shares of common stock reserved for issuance   3,849,000   3,849,000                                        
Common stock reserved for issuance (in shares)             2,008,000 2,654,000                                
Additional number of shares authorized for issuance 2,500,000                                              
Options granted of common stock (in shares)                 100,000                              
Stock-based compensation expense   $ 515 $ 641 $ 1,048 $ 977               $ 195 $ 259 $ 390 $ 442 $ 111 $ 137 $ 222 $ 231 $ 209 $ 245 $ 436 $ 304
Stock units granted (in shares)                   1,195,000   211,000                        
Vesting period           1 year         4 years                          
Vesting percentage on each anniversary of the vesting start date of awards granted                     25.00%                          
Contractual term                 10 years                              
Vesting percentage on the earlier of the first anniversary of the vesting start date and the date of the next annual meeting                       100.00%                        
Grant-date fair value (in dollars per share)                       $ 0.71                        
Number of shares of common stock for which contingent right is established by restricted stock unit (in shares)                       1                        
Estimated forfeiture rate (as a percent)   0.00%   0.00%