Note 5 - Derivative Instruments - Hedging Positions and Corresponding Fair Values (Details) - Designated as Hedging Instrument [Member] - Foreign Exchange Contract [Member] - Cash Flow Hedging [Member] $ in Thousands, £ in Millions, ₨ in Billions	May 31, 2017 USD ($)	May 31, 2017 GBP (£)	May 31, 2017 INR (₨)	Aug. 31, 2016 USD ($)
Gross Notional Value	$ 64,080	£ 5.4	₨ 4.2	$ 91,690
Fair Value Asset (Liability)	4,872			(1,922)
United Kingdom, Pounds
Gross Notional Value	7,560			33,280
Fair Value Asset (Liability)	(596)			(2,791)
India, Rupees
Gross Notional Value	56,520			58,410
Fair Value Asset (Liability)	$ 5,468			$ 869