Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS (Details)

v3.10.0.1
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