Note 11 - Other Long-term Liabilities - Summary of Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other	$ 8,869	$ 7,389
Total other long-term liabilities	67,827	61,330
GCI [Member]
Deferred revenue, noncurrent	31,113	33,184
IRU [Member]
Deferred revenue, noncurrent	25,732	19,366
Service, Other [Member]
Deferred revenue, noncurrent	$ 2,113	$ 1,391