Note 10 - Stock-Based Compensation Plans and Warrants (Detail) (USD $)	0 Months Ended	1 Months Ended				12 Months Ended			72 Months Ended					12 Months Ended			0 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended	1 Months Ended	12 Months Ended	17 Months Ended	25 Months Ended		12 Months Ended
	Jun. 04, 2009	Oct. 30, 2012	Oct. 31, 2012	Jun. 30, 2012	Nov. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2011	Dec. 14, 2011	Jul. 08, 2011	Dec. 31, 2009	Dec. 31, 2012 Director [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2010 Stock Options [Member]	Jan. 10, 2011 Restricted Stock [Member]	Jun. 30, 2010 Restricted Stock [Member]	Dec. 31, 2012 Restricted Stock [Member]	Dec. 31, 2012 2003 Management Equity Incentive Plan [Member]	Dec. 31, 2011 Outside Director Compensation Plan [Member]	Jun. 30, 2011 Outside Director Compensation Plan [Member]	May 31, 2009 2007Management Equity Incentive Plan [Member]	Dec. 31, 2008 2007Management Equity Incentive Plan [Member]	May 31, 2009 2007Management Equity Incentive Plan [Member]	Jan. 31, 2010 2007Management Equity Incentive Plan [Member]	Dec. 31, 2012 2007Management Equity Incentive Plan [Member]	Dec. 31, 2012 2009 Equity Incentive Plan [Member]	Dec. 31, 2010 2009 Equity Incentive Plan [Member]	Dec. 18, 2009 2009 Equity Incentive Plan [Member]	Oct. 31, 2012 Private Placement [Member]	Nov. 30, 2011 Private Placement [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number						862,500	862,500	727,500				325,000								315,000							10,000	537,500
Officers' Compensation (in Dollars)																					$ 7,500	$ 30,000
Allocated Share-based Compensation Expense (in Dollars)						99,000	1,130,000	1,388,000													5,000	20,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																													850,000	850,000
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award																												ten
Share-based Compensation (in Dollars)						383,000	2,376,000	4,009,000						284,000	1,245,000	2,561,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period						0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)							$ 7.28	$ 7.65
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross						0	135,000	402,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share)						$ 11.92	$ 11.92	$ 11.86				$ 12.31																					$ 9.88	$ 18.99
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures				13,795		537,500											140,000	115,000					90,000	150,000	100,000	250,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant						34,718													595,000
Common Stock, Shares, Issued					3	15,438,961	15,429,541			570,000			22,782																		250,000	666,667
Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued	59,312								72,782
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)						50,000
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Description and Terms						one
Proceeds from Issuance of Private Placement (in Dollars)					6,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period					666,667
Sale of Stock, Price Per Share (in Dollars per share)					$ 9					$ 9	$ 11																					$ 9
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			250,000		1
Common Stock Shares Available for Warrants Exercised					1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)			10		13																											13
Line of Credit Facility, Increase, Additional Borrowings (in Dollars)		$ 5,000,000	$ 5,000,000
Class of Warrant or Right, Outstanding						472,222