Note 9 - Preferred Stock and Warrants (Detail) (USD $)	0 Months Ended		12 Months Ended			0 Months Ended				0 Months Ended	54 Months Ended	0 Months Ended	54 Months Ended
	Feb. 02, 2016	Oct. 02, 2011	Dec. 31, 2011	Dec. 31, 2012	Nov. 18, 2011	Jul. 14, 2011 Preferred Class B [Member]	Jul. 14, 2011 Redeemable Preferred Stock [Member]	Dec. 23, 2009 Preferred Class A [Member]	Dec. 05, 2008 Preferred Class A [Member]	Oct. 02, 2011 Minimum [Member]	Jan. 31, 2016 Minimum [Member]	Oct. 02, 2011 Maximum [Member]	Jan. 31, 2016 Maximum [Member]
Preferred Stock, Shares Issued (in Shares)						56,600
Preferred Stock, Liquidation Preference Per Share (in Dollars per share)						$ 1,000
Proceeds from Issuance of Preferred Stock and Preference Stock (in Dollars)			$ 56,600,000			$ 56,600,000
Preferred Stock, Dividend Rate, Percentage	9.00%	1.00%								1.00%	1.00%	5.00%	7.00%
Percentage Increase in QSBL		10.00%
Preferred Stock Redemption Price Percentage				100.00%
Temporary Equity, Shares Outstanding (in Shares)							23,325
Preferred Stock, Redemption Amount (in Dollars)						23,425,398		15,000,000
Preferred Stock, Value, Issued (in Dollars)									$ 38,235,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)					385,434
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)					7.44