Note 18 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financial Assets at Fair Value Option	$ 30,400	$ 30,700
Financial Liabilities at Fair Value Option	34,000	29,000
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(3,434)	(1,841)	$ (2,568)
Financial Liabilites at Fair Value Option Contractual Principal	61,900	61,900
Financial Liabilities at Fair Value Option Accrued Interest Payable	$ 100	100
Fair Value Inputs, Discount Rate	85.00%
Fair Value, Measurements, Nonrecurring [Member]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0	0
Interest Rate Swaps [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 1,500	$ (1,600)	$ (4,000)