Note 10 - Equity Issuances (Detail) (USD $)	1 Months Ended	9 Months Ended				3 Months Ended		9 Months Ended
	May 31, 2011	Sep. 30, 2011	Sep. 30, 2012	Dec. 31, 2011	May 27, 2011	Sep. 30, 2012 General and Administrative Expense [Member]	Sep. 30, 2011 General and Administrative Expense [Member]	Sep. 30, 2012 General and Administrative Expense [Member]	Sep. 30, 2011 General and Administrative Expense [Member]
Common Stock, Shares, Issued (in Shares)			6,046,845	5,958,785	967,950
Sale of Stock, Price Per Share (in Dollars per share)					$ 10.50
Proceeds from Issuance of Common Stock	$ 9,391,967	$ 9,390,000
Allocated Share-based Compensation Expense						$ 58,000	$ 73,000	$ 176,000	$ 217,000