Note 9 - Other Long-term Liabilities - Summary of Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other	$ 11,728	$ 10,219
Total other long-term liabilities	91,991	78,520
IRU [Member]
Deferred revenue, noncurrent	48,315	34,440
GCI [Member]
Deferred revenue, noncurrent	27,487	29,036
Service, Other [Member]
Deferred revenue, noncurrent	$ 4,461	$ 4,825