Note 9 - Subsequent Event (Detail) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	6 Months Ended	24 Months Ended
	Oct. 30, 2012	Jun. 30, 2011	Sep. 30, 2012	Nov. 30, 2011	Nov. 30, 2009
Line of Credit Facility, Increase, Additional Borrowings (in Dollars)	$ 5	$ 2	$ 7
Debt Instrument, Interest Rate, Stated Percentage	6.00%		6.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)	250,000			1	1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)	10			13	15
Investment Warrants Expiration Date	Dec. 31, 2008