Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Details)

v3.8.0.1
FAIR VALUE MEASUREMENTS (Details)
May 31, 2018
USD ($)
Assets
Liabilities
Aug. 31, 2017
USD ($)
Assets
Liabilities
Information on assets and liabilities measured at fair value [Abstract]    
Held-to-maturity securities $ 189,800 $ 188,000
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Number of assets or liabilities [Abstract]    
Number of assets | Assets 0 0
Number of liabilities | Liabilities 0 0
Significant Other Observable Inputs (Level 2)    
Number of assets or liabilities [Abstract]    
Number of assets | Assets 16 56
Significant Unobservable Inputs (Level 3)    
Number of assets or liabilities [Abstract]    
Number of liabilities | Liabilities 1 1
Recurring [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Accumulated unrealized gains and (losses) $ 60,224 $ (11,100)
Recurring [Member] | Certificates of Deposit [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Accumulated unrealized gains and (losses) (1,219) (20,800)
Recurring [Member] | US Treasuries [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Accumulated unrealized gains and (losses) 61,443 9,700
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)    
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) | 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) | 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)    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 17,005,914 20,055,400
Recurring [Member] | Significant Other Observable Inputs (Level 2) | Certificates of Deposit [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 1,248,781 12,673,700
Recurring [Member] | Significant Other Observable Inputs (Level 2) | US Treasuries [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 15,757,133 7,381,700
Recurring [Member] | Significant Unobservable Inputs (Level 3)    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) | 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) | 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 17,005,914 20,055,400
Recurring [Member] | Fair Value [Member] | Certificates of Deposit [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 1,248,781 12,673,700
Recurring [Member] | Fair Value [Member] | US Treasuries [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 15,757,133 7,381,700
Recurring [Member] | Cost / Other Value [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 16,945,690 20,066,500
Recurring [Member] | Cost / Other Value [Member] | Certificates of Deposit [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities 1,250,000 12,694,500
Recurring [Member] | Cost / Other Value [Member] | US Treasuries [Member]    
Information on assets and liabilities measured at fair value [Abstract]    
Available-for-sale securities $ 15,695,690 $ 7,372,000