Note 7. Line of Credit (Detail) (USD $) In Millions, unless otherwise specified								6 Months Ended
	Feb. 28, 2013 Eurodollar Rate [Member] Canadian Lender [Member]	Aug. 31, 2012 Revolving Credit Loans, Line of Credit [Member]	Aug. 31, 2012 Floorplan Loans, Line of Credit [Member]	Feb. 28, 2013 PNC Loan Agreement [Member]	Aug. 31, 2012 PNC Loan Agreement [Member]	Jan. 31, 2012 PNC Loan Agreement [Member]	Feb. 28, 2013 Canadian Lender [Member]	Feb. 28, 2013 De Lage Landen Financial Services, Inc. [Member]
Line of Credit Facility, Maximum Borrowing Capacity					$ 30.0	$ 45.0	$ 5.0	$ 32.0
Sublimit for Letter of Credit				7.0
Debt Instrument, Basis Spread on Variable Rate	3.00%	3.25%	6.25%				1.00%
Line of Credit Facility, Interest Rate at Period End							4.25%
Line of Credit Facility, Borrowing Capacity, Description								As of the date of the refinancing with PNC, the DLL Credit Facility provided for aggregate borrowings of the lesser of $32.0 million or 85% of the Borrower's eligible accounts receivable, plus 100% of unsold inventory financed by DLL and 40% of all other unsold inventory.
Line of Credit Facility, Amount Outstanding				12.5	12.0
Line of Credit Facility, Remaining Borrowing Capacity				$ 3.5	$ 4.2