Note 2 - Revenue 2 (Details Textual) $ in Thousands	Sep. 30, 2020 USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 73,329
Equipment Delivery, Installation and Configuration [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Revenue, Remaining Performance Obligation, Amount	$ 2,253
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]: 2020-10-01
Revenue, Remaining Performance Obligation, Amount	$ 71,076
Business Broad Band, Voice and Managed IT Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01 | 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]: 2020-10-01 | Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	10 years