Note 6 - Fair Value of Long-lived Assets Measured on a Nonrecurring Basis (Details) - Long-lived Assets Held-for-sale [Member] - Fair Value, Measurements, Nonrecurring [Member] - Fair Value, Inputs, Level 3 [Member] $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)
Long-lived assets held for sale	$ 20,186	$ 20,186
Long-lived assets held for sale	$ (400)	$ (7,481)