Note 2 - Joint Venture - Certain Financial Information About the Joint Venture Included On the Company's Consolidated Balance Sheet (Details) - ACS Cable Systems LLC and Quintillion Holdings, LLC Joint Venture [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Cash	$ 190	$ 67
Fiber and IRUs, net of accumulated depreciation of $186 and $112	$ 1,955	$ 2,029