Note 2 - Sale of Wireless Operations - Schedule of Company's Obligation for Exit Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Balance	$ 1,223	$ 490
Charged to expense		10,745
Paid and/or settled	(1,130)	(10,012)
Credited to expense	(93)
Balance		1,223
Labor Obligations [Member]
Balance	1,223	490
Charged to expense		6,485
Paid and/or settled	(1,130)	(5,752)
Credited to expense	(93)
Balance		1,223
Contract Termination [Member]
Balance
Charged to expense		3,966
Paid and/or settled		(3,966)
Credited to expense
Balance
Other Associated Obligations [Member]
Balance
Charged to expense		294
Paid and/or settled		(294)
Credited to expense
Balance