Note 11 - Goodwill and Intangible Assets (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Amortization of Intangible Assets	$ 75,000	$ 125,000	$ 479,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	50,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	38,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	38,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	38,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	38,000
Licensing Agreements [Member]
Payments to Acquire Intangible Assets	$ 200,000