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FAIR VALUE MEASUREMENTS (Details) | Aug. 31, 2018 USD ($) Asset Liability | Aug. 31, 2017 USD ($) Asset Liability
--- | --- | ---
Information on assets and liabilities measured at fair value [Abstract] |  |
Held-to-maturity securities | $ 190,400 | $ 188,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Number of assets or liabilities [Abstract] |  |
Number of assets | Asset | 0 | 0
Number of liabilities | Liability | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] |  |
Number of assets or liabilities [Abstract] |  |
Number of assets | Asset | 7 | 56
Significant Unobservable Inputs (Level 3) [Member] |  |
Number of assets or liabilities [Abstract] |  |
Number of liabilities | Liability | 1 | 1
Recurring [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Accumulated unrealized gains and (losses) | $ 66,400 |
Recurring [Member] | Certificates of Deposit [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Accumulated unrealized gains and (losses) | 0 | $ (20,800)
Recurring [Member] | Short-term Investments [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Accumulated unrealized gains and (losses) |  | (11,100)
Recurring [Member] | US Treasuries [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Accumulated unrealized gains and (losses) | 66,400 | 9,700
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 0 |
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Certificates of Deposit [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 0 | 0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Short-term Investments [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities |  | 0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | US Treasuries [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 0 | 0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 8,718,000 |
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Certificates of Deposit [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 0 | 12,673,700
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Short-term Investments [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities |  | 20,055,400
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | US Treasuries [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 8,718,000 | 7,381,700
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 0 |
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Certificates of Deposit [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 0 | 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Short-term Investments [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities |  | 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | US Treasuries [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 0 | 0
Recurring [Member] | Fair Value [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 8,718,000 |
Recurring [Member] | Fair Value [Member] | Certificates of Deposit [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 0 | 12,673,700
Recurring [Member] | Fair Value [Member] | Short-term Investments [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities |  | 20,055,400
Recurring [Member] | Fair Value [Member] | US Treasuries [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 8,718,000 | 7,381,700
Recurring [Member] | Cost/Other Value [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 8,644,900 |
Recurring [Member] | Cost/Other Value [Member] | Certificates of Deposit [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | 0 | 12,694,500
Recurring [Member] | Cost/Other Value [Member] | Short-term Investments [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities |  | 20,066,500
Recurring [Member] | Cost/Other Value [Member] | US Treasuries [Member] |  |
Information on assets and liabilities measured at fair value [Abstract] |  |
Available-for-sale securities | $ 8,644,900 | $ 7,372,000

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