Note 2 - Revenue 2 (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2020	Jan. 01, 2020
Revenue, Remaining Performance Obligation, Amount	$ 80,307
Equipment Delivery, Installation and Configuration [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue, Remaining Performance Obligation, Amount		$ 2,244
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)		12 months
Business Broad Band, Voice and Managed IT Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue, Remaining Performance Obligation, Amount		$ 78,063
Business Broad Band, Voice and Managed IT Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01 | Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)		1 year
Business Broad Band, Voice and Managed IT Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01 | Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)		10 years