Note 1 - Basis of Presentation - Variable Interest Entity (Details) - USD ($) $ in Thousands	Jun. 30, 2017	May 30, 2017	Jan. 17, 2017	Dec. 31, 2016
Assets:
Auction proceeds receivable	$ 90,824	$ 90,800
Total assets	2,969,822			2,783,331
Current liabilities:
Total liabilities	2,397,767			$ 2,290,470
GME [Member]
Assets:
Auction proceeds receivable	90,824
Total assets	90,824
Current liabilities:
Note payable	90,824		$ 106,000
Total liabilities	$ 90,824