Note 5 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Goodwill, Ending Balance	$ 13,738	$ 13,738	$ 13,738
Amortization of Intangible Assets, Total		$ 1,103	1,161
Discounted Cash Flows, Discount Rate	14.50%	18.50%
Goodwill and Intangible Asset Impairment, Total		$ 0	$ 0