Note 13 - Commitments and Contingencies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Leases, Rent Expense	$ 1,700,000	$ 1,800,000	$ 1,500,000
Indemnification Agreement [Member]
Other Liabilities	$ 0	$ 0	$ 0