Marketable Securities (Tables)

9 Months Ended

May 31, 2017

Marketable Securities [Abstract]

Schedule of marketable securities include investments in equity securities

	May 31, 2017		August 31, 2016
Short-term:
D.N.A (see b below)	$	1,092	$	701
Held to maturity bonds (see c below)		1,980		2,154
	$	3,072	$	2,855
Long-term:
Held to maturity bonds (see c below)	$	1,409	$	530

Schedule of amortized cost and estimated fair value of held-to-maturity securities

	May 31, 2017
	Amortized cost		Gross unrealized losses			Estimated fair value
Short-term:
Commercial bonds	$	1,951	$	(1	)	$	1,950
Accrued interest		29		-			29
Long-term		1,409		-			1,409
	$	3,389	$	(1	)	$	3,388

	August 31, 2016
	Amortized cost		Gross unrealized gains		Estimated fair value
Short-term:
Commercial bonds	$	2,118	$	-	$	2,118
Accrued interest		36		-		36
Long-term		530		1		531
	$	2,684	$	1	$	2,685