Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	4 Months Ended	12 Months Ended
	Dec. 31, 2018	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Income Taxes [Line Items]
Operating loss carryforwards			$ 33,799
Valuation allowance			3,397	$ 612
Increase (decrease) in valuation allowance			(2,780)	(129)	$ (301)
Total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate			1,800	1,600
Unrecognized tax benefits			2,111	2,359	3,024	$ 3,115
Balance of interest and penalties related to uncertain tax positions			200	300
Reductions for tax positions of prior years resulting from the lapse of applicable statute of limitations			$ (253)	$ (634)	$ (212)
Federal statutory income tax rate			25.70%	35.00%	(35.00%)
Income tax benefits from effects of 2017 Tax Act			$ (1,654)
One-time benefit from enactment			900
One-time benefit from re-measuring net deferred tax liabilities			800
One-time benefit from other enactment changes			200
Income tax expense from repatriation of foreign earnings			100
Operating loss carryforwards			33,799
Jhana Education [Member]
Income Taxes [Line Items]
Valuation allowance				$ 200
Operating loss carryforwards				7,700
Forecast [Member]
Income Taxes [Line Items]
Expect decrease in unrecognized tax benefit		$ 200
Tax Year 2018 [Member] | Forecast [Member] | Subsequent Event [Member]
Income Taxes [Line Items]
Federal statutory income tax rate	21.00%
United States - Federal Income Tax [Member]
Income Taxes [Line Items]
Operating loss carryforwards			9,700	16,400
Foreign [Member]
Income Taxes [Line Items]
Valuation allowance				400	$ 300
Increase (decrease) in valuation allowance			(200)	100
Increase (decrease) in income tax benefit			$ 200	(100)
Additional Paid-in Capital [Member]
Income Taxes [Line Items]
Reduction of income tax expense in additional paid in capital				$ 168	$ (52)