Note 2 - Revenue 2 (Details Textual)	Jan. 01, 2020 USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 79,373,000
Equipment Delivery, Installation and Configuration [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Amount	$ 1,851,000
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]: 2020-04-01 | Minimum [Member]
Revenue, Remaining Performance Obligation, Amount	$ 77,522
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]: 2020-04-01 | Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	10 years