Summary of Significant Accounting Policies - AOCI (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Oct. 31, 2014	Jun. 30, 2012	Aug. 31, 2017 USD ($) item	Aug. 31, 2016 USD ($)	Aug. 31, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of Operating Segments | item			2
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment | $			$ 307	$ 2,152	$ (134)
NEPTCO
Accumulated Other Comprehensive Income (Loss) [Line Items]
Percentage of ownership stake acquired	50.00%	50.00%