Note 1 - Description of Business and Summary of Significant Accounting Policies (Detail) (USD $)	0 Months Ended		1 Months Ended				3 Months Ended		12 Months Ended	61 Months Ended
	Mar. 05, 2013	Dec. 14, 2011	Mar. 31, 2013	Oct. 30, 2012	Nov. 30, 2011	Jul. 08, 2011	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Jun. 30, 2011	Oct. 30, 2010	Oct. 19, 2010	Jun. 30, 2006
Net Income (Loss) Available to Common Stockholders, Diluted							$ (7,439,000)	$ (4,448,000)
Working Capital	17,500,000		9,600,000				9,600,000
Net Cash Provided by (Used in) Operating Activities							(6,722,000)	(4,020,000)
Payments for Extension of Option Agreement							3,300,000
Proceeds from Convertible Debt										36,400,000
Line of Credit Facility, Maximum Borrowing Capacity				10,000,000								10,000,000
Line of Credit Facility, Increase, Additional Borrowings (in Dollars)	17,500,000			5,000,000
Debt Instrument, Face Amount											3,200,000		36,400,000
Secured Debt			30,173,000				30,173,000
Outstanding Debt Held In Convertible Bond Instrument	36,000,000
Common Stock Issuance Covered by Shelf Statement										50,000,000
Proceeds from Issuance of Common Stock		5,100,000				4,000,000
Common Stock, Shares, Issued (in Shares)			15,452,756	250,000		363,636	15,452,756		15,438,961
Sale of Stock, Price Per Share (in Dollars per share)		$ 9			$ 9	$ 11
Stock Issued During Period, Shares, New Issues (in Shares)		570,000			666,667
Common Stock Additional Capacity Under Shelf Registration		40,000,000
Proceeds from Issuance of Private Placement (in Dollars)					6,000,000
Base for Issuing Purchase Warrants (in Shares)					3
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)					1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)				10	13
Proceeds from Issuance of Long-term Debt			17,500,000				83,458,000
Fair Value of Assets Acquired							923,000		1,090,000
Private Placement [Member]
Common Stock, Shares, Issued (in Shares)					666,667
Sale of Stock, Price Per Share (in Dollars per share)					$ 9
Base for Issuing Purchase Warrants (in Shares)					3
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)					13
Non-Convertible Secured Debt [Member]
Secured Debt	30,000,000
Term Loan [Member]
Debt Instrument, Face Amount	$ 66,000,000