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Note 4 - Acquisitions (Details Textual) - USD ($) $ in Millions | 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 | $ 1.2 |  |  |
Payments for Repurchase of Redeemable Noncontrolling Interest | $ 1.2 |  |  |
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 |  | $ 2.0 |  | $ 3.5
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 |  |  | $ 77.8 |
Payments to Acquire Businesses, Gross |  |  | 83.5 |
Business Combination, Consideration Transferred, Estimated Price Adjusments |  |  | $ 5.7 |

X
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
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