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Marketable Securities (Details) - USD ($)
$ in Thousands
Feb. 29, 2020
Aug. 31, 2019
Short-term:    
D.N.A (see b below) $ 373 $ 557
Entera (see c below) 367 304
Held to maturity bonds (see d below) 1,764 2,840
Mutual funds 3,200  
Marketable securities 5,704 3,701
Long-term:    
Held to maturity bonds (see d below) $ 250 $ 1,295