Note 6 - Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Finite-Lived Intangible Asset, Useful Life	15 years
Finite-Lived Intangible Assets, Remaining Amortization Period	fifteen year
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 889
Finite-Lived Intangible Assets, Amortization Expense, Year Two	889
Finite-Lived Intangible Assets, Amortization Expense, Year Three	889
Finite-Lived Intangible Assets, Amortization Expense, Year Four	889
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 889