Note 11 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Interest Rate Swap [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ (1,700)	$ 2,100	$ (3,800)	$ 800
Financial Liabilites at Fair Value Option Contractual Principal	61,900		61,900		$ 61,900
Financial Assets at Fair Value Option	30,800		30,800		30,700
Financial Liabilities at Fair Value Option Accrued Interest Payable	100		100		100
Financial Liabilities at Fair Value Option	27,500		27,500		$ 29,000
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ (1,115)	$ 768	$ (2,102)	$ 173
Fair Value Inputs, Discount Rate			85.00%