Note 5 - Stock-Based Compensation Plans and Warrants (Detail) (USD $)	0 Months Ended		1 Months Ended		3 Months Ended				3 Months Ended	12 Months Ended	114 Months Ended	3 Months Ended		0 Months Ended		3 Months Ended		32 Months Ended			0 Months Ended	22 Months Ended	29 Months Ended
	Mar. 05, 2013	Dec. 14, 2011	Oct. 30, 2012	Nov. 30, 2011	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Jul. 08, 2011	Mar. 31, 2013 Outside Director Compensation Plan [Member]	Jun. 30, 2012 Outside Director Compensation Plan [Member]	Jun. 30, 2012 Outside Director Compensation Plan [Member]	Mar. 31, 2013 2009 Equity Incentive Plan [Member] Directors [Member]	Mar. 31, 2013 2009 Equity Incentive Plan [Member] Maximum [Member]	Jan. 10, 2011 2009 Equity Incentive Plan [Member]	Jan. 14, 2010 2009 Equity Incentive Plan [Member]	Mar. 31, 2013 2009 Equity Incentive Plan [Member]	Mar. 31, 2012 2009 Equity Incentive Plan [Member]	Aug. 30, 2012 2009 Equity Incentive Plan [Member]	Jan. 31, 2011 2009 Equity Incentive Plan [Member]	Dec. 31, 2009 2009 Equity Incentive Plan [Member]	May 22, 2009 2007Management Equity Incentive Plan [Member]	May 22, 2009 2007Management Equity Incentive Plan [Member]	Dec. 31, 2009 2007Management Equity Incentive Plan [Member]	Mar. 31, 2013 2003 Management Equity Incentive Plan [Member]	Mar. 31, 2013 2007Management Equity Incentive Plan [Member]	Dec. 18, 2009 2009 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number					862,500											537,500								315,000	10,000
Officers' Compensation (in Dollars)									$ 7,500	$ 30,000
Allocated Share-based Compensation Expense (in Dollars)					25,000	25,000			5,000	20,000						41,000	134,000
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, Fair Value Assumptions, Expected Term																10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period													24 months
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)					4,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures											72,782	22,782		140,000	115,000			537,500			90,000	240,000	150,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant																34,718			595,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number										13,795	13,795
Proceeds from Issuance of Private Placement (in Dollars)				6,000,000
Stock Issued During Period, Shares, New Issues		570,000		666,667
Sale of Stock, Price Per Share (in Dollars per share)		$ 9		$ 9				$ 11
Base for Issuing Purchase Warrants				3
Warrant Issued				1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)			10	13
Line of Credit Facility, Increase, Additional Borrowings (in Dollars)	$ 17,500,000		$ 5,000,000
Common Stock, Shares, Issued			250,000		15,452,756		15,438,961	363,636
Warrants Outstanding					472,222