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Balance Sheet Components (Details 2) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2010
Intangible Assets      
Gross Carrying Amount $ 2,089 $ 2,051  
Accumulated Amortization 537 198  
Total 1,552 1,853  
Amortization expense recognized 354 88 37
Estimated amortization expense for intangible assets      
2013 347    
2014 329    
2015 298    
2016 276    
2017 31    
Thereafter 271    
Total 1,552 1,853  
Accrued Expenses and Other Current Liabilities      
Accrued compensation and benefits 2,179 2,238  
Accrued business expenses 592 879  
Deferred rent 545 563  
Accrued professional service fees 325 2,098  
Taxes payable 286 351  
Customer deposits 146 318  
Government grants 77 53  
Other (individually less than 5% of total accrued expenses and other current liabilities) 819 861  
Total 4,969 7,361  
Maximum percentage of total accrued expenses and other current liabilities 5.00%    
Patents and trademarks
      
Intangible Assets      
Weighted Average Amortization Period 17 years 17 years  
Gross Carrying Amount 585 500  
Accumulated Amortization 146 114  
Total 439 386  
Estimated amortization expense for intangible assets      
Total 439 386  
Acquired technology
      
Intangible Assets      
Weighted Average Amortization Period 4 years 4 years  
Gross Carrying Amount 167 172  
Accumulated Amortization 101 61  
Total 66 111  
Estimated amortization expense for intangible assets      
Total 66 111  
Customer relationships
      
Intangible Assets      
Weighted Average Amortization Period 5 years 5 years  
Gross Carrying Amount 1,337 1,379  
Accumulated Amortization 290 23  
Total 1,047 1,356  
Estimated amortization expense for intangible assets      
Total $ 1,047 $ 1,356