Note 2 - Revenue Recognition 2 (Details Textual)	Jun. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01 | Equipment Delivery, Installation and Configuration [Member]
Revenue, Remaining Performance Obligation, Amount	$ 1,620,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01 | Business Broad Band, Voice and Managed IT Services [Member]
Revenue, Remaining Performance Obligation, Amount	97,963,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Amount	$ 99,583,000