Note 4 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Amortization of Intangible Assets	$ 245	$ 182	$ 580	$ 354
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	862		862
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1,162		1,162
Finite-Lived Intangible Assets, Amortization Expense, Year Three	1,162		1,162
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,162		1,162
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 1,162		$ 1,162