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Balance Sheet Components (Details 2) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 12 Months Ended
Feb. 28, 2014
Aug. 31, 2013
Intangible Assets    
Gross Carrying Amount $ 1,911 $ 3,029
Accumulated Amortization and Impairment 430 1,650
Total 1,481 1,379
Patents and trademarks
   
Intangible Assets    
Weighted Average Amortization Period 14 years 15 years
Gross Carrying Amount 1,201 973
Accumulated Amortization and Impairment 205 161
Total 996 812
Acquired technology
   
Intangible Assets    
Weighted Average Amortization Period 5 years 5 years
Gross Carrying Amount 710 719
Accumulated Amortization and Impairment 225 152
Total 485 567
Customer relationships
   
Intangible Assets    
Weighted Average Amortization Period   5 years
Gross Carrying Amount   1,337
Accumulated Amortization and Impairment   1,337
Impairment of Long-Lived Assets    
Impairment charge of finite lived asset   $ 851