Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS (Details)

v3.19.3
FAIR VALUE MEASUREMENTS (Details)
Aug. 31, 2019
USD ($)
Asset
Liability
Aug. 31, 2018
USD ($)
Asset
Liability
Information on assets and liabilities measured at fair value [Abstract]    
Held-to-maturity securities $ 192,800 $ 190,400
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 1 7
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) $ 3,900 $ 66,400
Recurring [Member] | Certificates of Deposit [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Accumulated unrealized gains and (losses) 0 0
Recurring [Member] | US Treasuries [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Accumulated unrealized gains and (losses) 3,900 66,400
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 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] | 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 4,996,000 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 0
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 4,996,000 8,718,000
Recurring [Member] | Significant Unobservable Inputs (Level 3) [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] | 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] | 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 4,996,000 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 0
Recurring [Member] | Fair Value [Member] | US Treasuries [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 4,996,000 8,718,000
Recurring [Member] | Cost / Other Value [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 4,992,100 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 0
Recurring [Member] | Cost / Other Value [Member] | US Treasuries [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities $ 4,992,100 $ 8,644,900