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Summary of Significant Accounting Policies - Others (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2016 | Aug. 31, 2016 | Aug. 31, 2015
Summary of Significant Accounting Policies |  |  |
Impairment loss on investment | $ 597 | $ 597 | $ 0
Advertising Costs |  |  |
Advertising costs incurred |  | 22 | $ 36
Revenues Recognition |  |  |
Minimum warranty period |  |  | 3 months
Maximum warranty period |  |  | 2 years
Accounts Receivable |  |  |
Bad debt expense |  | $ 125 | $ 74

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