Note 4 - Accounts Payable, Accrued Expenses and Other Liabilities - Summary of Accounts Payable, Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts payable, trade	$ 9,399	$ 13,847
Accrued compensation and other	11,686	28,507
Accrued operating expenses	17,508	17,048
Total accounts payable, accrued expenses and other liabilities	$ 38,593	$ 59,402