Note 9 - Goodwill and Other Intangible Assets - (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill, Ending Balance	$ 48,495,000	$ 49,488,000
Goodwill, Written off Related to Sale of Business Unit	1,000,000
Gain (Loss) on Disposition of Business	(1,000,000)
Goodwill, Impaired, Accumulated Impairment Loss	0
Amortization of Intangible Assets, Total	$ 905,000	$ 559,000	$ 276,000