Note 5 - Derivative Instruments (Details)	3 Months Ended		6 Months Ended										6 Months Ended					6 Months Ended
	Feb. 28, 2015 USD ($)	Feb. 28, 2014 USD ($)	Feb. 28, 2015 USD ($)	Feb. 28, 2014 USD ($)	Feb. 28, 2015 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] India, Rupees Foreign Exchange Contract [Member] USD ($)	Aug. 31, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] India, Rupees Foreign Exchange Contract [Member] USD ($)	Feb. 28, 2015 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Philippines, Pesos Foreign Exchange Contract [Member] USD ($)	Aug. 31, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Philippines, Pesos Foreign Exchange Contract [Member] USD ($)	Feb. 28, 2015 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] United Kingdom, Pounds Foreign Exchange Contract [Member] USD ($)	Aug. 31, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] United Kingdom, Pounds Foreign Exchange Contract [Member] USD ($)	Feb. 28, 2015 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Euro Member Countries, Euro Foreign Exchange Contract [Member] USD ($)	Aug. 31, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Euro Member Countries, Euro Foreign Exchange Contract [Member] USD ($)	Feb. 28, 2015 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Contract [Member] USD ($)	Feb. 28, 2015 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Contract [Member] EUR (€)	Feb. 28, 2015 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Contract [Member] GBP (£)	Feb. 28, 2015 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Contract [Member] INR	Aug. 31, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Contract [Member] USD ($)	Feb. 28, 2015 Through the Fourth Quarter of Fiscal 2016 [Member] India, Rupees	Feb. 28, 2015 Through the Second Quarter of Fiscal 2017 [Member] India, Rupees	Feb. 28, 2015 Through the Fourth Quarter of Fiscal 2015 [Member] Philippines, Pesos	Feb. 28, 2015 Through the Second Quarter of Fiscal 2016 [Member] United Kingdom, Pounds	Feb. 28, 2015 Through the Second Quarter of Fiscal 2016 [Member] Euro Member Countries, Euro
Note 5 - Derivative Instruments (Details) [Line Items]
Gain (Loss) on Discontinuation of Foreign Currency Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net	$ 0	$ 0	$ 0	$ 0
Percent of Foreign Exchange Contracts Hedged																		75.00%	50.00%	50.00%	50.00%	50.00%
Derivative Asset, Notional Amount					37,005,000	38,479,000	6,500,000	6,500,000	30,539,000	0	19,877,000	0	93,921,000	17,600,000	20,300,000	2,500,000,000	44,979,000
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred													$ 1,200,000