Note 9 - Other Long-term Liabilities - Summary of Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other	$ 12,345	$ 10,219
Total other long-term liabilities	80,606	78,520
IRU [Member]
Deferred revenue, noncurrent	35,201	34,440
GCI [Member]
Deferred revenue, noncurrent	28,519	29,036
Service, Other [Member]
Deferred revenue, noncurrent	$ 4,541	$ 4,825