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Schedule of short term investments (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
May 31, 2021 | Aug. 31, 2020
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Short term investment, amortized cost | $ 60,948 | $ 66,804
Gross unrealized gains | 0 | 0
Gross unrealized loss | (23) | (61)
Short term investment, fair value | 60,925 | 66,743
Commercial Paper [Member] |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Short term investment, amortized cost | 60,948 | 66,804
Gross unrealized gains | 0 | 0
Gross unrealized loss | (23) | (61)
Short term investment, fair value | $ 60,925 | $ 66,743

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- Definition Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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