Note 10 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Financial Assets at Fair Value Option	$ 30,400		$ 30,400
Financial Liabilities at Fair Value Option	34,500		34,000
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(378)	$ (987)
Financial Liabilites at Fair Value Option Contractual Principal	61,900		61,900
Financial Liabilities at Fair Value Option Accrued Interest Payable	$ 200		100
Fair Value Inputs, Discount Rate	85.00%
Fair Value, Measurements, Nonrecurring [Member]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0		$ 0
Interest Rate Swap [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 200	$ (2,100)