Income Taxes (Schedule of Effective income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Income Tax Disclosure [Abstract]
U.S. statutory rate	$ 443	$ 8,700	$ 12,500
State and local taxes, net of federal tax benefit	(379)	743	480
Foreign tax rate differences	164	809	(486)
U.S. tax reform	160	2,496	0
Deferred tax asset valuation allowance	142	758	(21)
Domestic production activities deduction	0	(727)	(700)
Federal credits	(338)	(375)	(288)
Uncertain tax benefits	(153)	198	264
Other	(104)	974	787
Total income tax provision	$ (65)	$ 13,576	$ 12,536
U.S statutory rate, percentage	21.00%	25.70%	35.00%
State and local taxes, net of federal tax benefit, percentage	(18.00%)	2.20%	1.30%
Foreign tax rate differences, percentage	7.80%	2.40%	(1.40%)
U.S. tax reform, percentage	7.60%	7.40%
Deferred tax asset valuation allowance, percentage	6.70%	2.20%	(0.10%)
Domestic production activities deduction, percentage		(2.10%)	(2.00%)
Federal Credits, percentage	(16.00%)	(1.10%)	(0.80%)
Uncertain Tax Benefits, percentage	(7.30%)	0.60%	0.70%
Other, percentage	(4.90%)	2.90%	2.20%
Effective rate, percentage	(3.10%)	40.10%	35.10%