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Note 3 - Acquisitions (Details Textual) - USD ($) $ in Thousands | Feb. 13, 2018 | Feb. 01, 2017 | Jan. 20, 2017 | Feb. 27, 2015
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Ting Virginia LLC [Member] |  |  |  |
Business Combination, Consideration Transferred, Total | $ 1,200 |  |  |
Payments for Repurchase of Redeemable Noncontrolling Interest | $ 1,200 |  |  |
Repurchase of Redeemable Noncontrolling Interest, Percentage | 10.00% |  |  |
Ting Virginia LLC [Member] |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 20.00% |  | 70.00%
Business Combination, Consideration Transferred, Total |  | $ 2,000 |  | $ 3,500
Ting Virginia LLC [Member] | Exercisable by the Minority Shareholders [Member] |  |  |  |
Business Combination, Interest Subject to Call Option, Not Exercised in Period |  | 10.00% |  |
eNom, Incorporated [Member] |  |  |  |
Business Combination, Consideration Transferred, Total |  |  | $ 77,832 |
Payments to Acquire Businesses, Gross |  |  | 83,500 |
Business Combination, Consideration Transferred, Estimated Price Adjusments |  |  | $ 5,700 |

X
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