Note 10 - Equity Method Investment - TEL's Summarized Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current Assets	$ 14,320	$ 14,275
Non-current Assets	146,081	125,782
Current Liabilities	34,766	29,644
Non-current Liabilities	96,140	84,516
Total Equity	$ 29,495	$ 25,897