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Note 13 - Stockholders' Equity - Stockholders' Equity Transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Balances | $ 65,409 |  |  | $ 60,211 | [1] |  |
Exercise of stock options (in shares) | 16,153 | 66,746 |  | 28,716 |  | 135,622 |
Exercise of stock options | $ 32 |  |  | $ 39 |  |  |
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration | (141) |  |  | (288) |  |  |
Stock-based compensation (note 14) | 615 |  |  | 1,193 |  |  |
Net income | 3,608 | $ 5,242 | [2],[3] | 7,352 |  | $ 7,686 | [2],[3]
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  | (64) |  |  |
Other comprehensive loss | (260) | $ 126 | [2] | (243) |  | $ 231 | [2]
Balances | $ 69,263 |  |  | 69,263 |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  | 1,063 |  |  |
Balances |  |  |  | $ 61,274 |  |  |
Common Stock [Member] |  |  |  |  |  |  |
Balances (in shares) | 10,592,115 |  |  | 10,583,879 |  |  |
Balances | $ 15,426 |  |  | $ 15,368 |  |  |
Exercise of stock options (in shares) | 16,153 |  |  | 28,716 |  |  |
Exercise of stock options | $ 122 |  |  | $ 180 |  |  |
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration (in shares) | (4,902) |  |  | (9,229) |  |  |
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration |  |  |  |  |  |  |
Stock-based compensation (note 14) |  |  |  |  |  |  |
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  |  |  |  |
Other comprehensive loss |  |  |  |  |  |  |
Balances (in shares) | 10,603,366 |  |  | 10,603,366 |  |  |
Balances | $ 15,548 |  |  | $ 15,548 |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  |  |  |  |
Balances |  |  |  | 15,368 |  |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |
Balances | 2,547 |  |  | 2,167 |  |  |
Exercise of stock options | (90) |  |  | (141) |  |  |
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration | (141) |  |  | (288) |  |  |
Stock-based compensation (note 14) | 615 |  |  | 1,193 |  |  |
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  |  |  |  |
Other comprehensive loss |  |  |  |  |  |  |
Balances | 2,931 |  |  | 2,931 |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  |  |  |  |
Balances |  |  |  | 2,167 |  |  |
Retained Earnings [Member] |  |  |  |  |  |  |
Balances | 47,419 |  |  | 42,676 |  |  |
Exercise of stock options |  |  |  |  |  |  |
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration |  |  |  |  |  |  |
Stock-based compensation (note 14) |  |  |  |  |  |  |
Net income | 3,608 |  |  | 7,352 |  |  |
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  | (64) |  |  |
Other comprehensive loss |  |  |  |  |  |  |
Balances | 51,027 |  |  | 51,027 |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  | 1,063 |  |  |
Balances |  |  |  | 43,739 |  |  |
AOCI Attributable to Parent [Member] |  |  |  |  |  |  |
Balances | 17 |  |  |  |  |  |
Exercise of stock options |  |  |  |  |  |  |
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration |  |  |  |  |  |  |
Stock-based compensation (note 14) |  |  |  |  |  |  |
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  |  |  |  |
Other comprehensive loss | (260) |  |  | (243) |  |  |
Balances | $ (243) |  |  | (243) |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  |  |  |  |
Balances |  |  |  |  |  |  |
[1] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.
[2] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.
[3] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.

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