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Note 13 - Stockholders' Equity - Stockholders' Equity Transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Balances | $ 69,263 |  |  | $ 60,211 | [1] |  |
Exercise of stock options (in shares) | 15,782 | 30,051 |  | 44,498 |  | 165,673 |
Exercise of stock options | $ 23 |  |  | $ 62 |  |  |
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration | (116) |  |  | (404) |  |  |
Stock-based compensation (note 14) | 711 |  |  | 1,904 |  |  |
Net income | 5,346 | $ 3,440 | [2],[3] | 12,698 |  | $ 11,128 | [2],[3]
Other comprehensive income | 207 | $ (9) |  | (36) |  | $ 222 |
Balances | $ 75,434 |  |  | 75,434 |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  | 1,063 |  |  |
Balances |  |  |  | 61,274 |  |  |
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  | $ (64) |  |  |
Common Stock [Member] |  |  |  |  |  |  |
Balances (in shares) | 10,603,366 |  |  | 10,583,879 |  |  |
Balances | $ 15,548 |  |  | $ 15,368 |  |  |
Exercise of stock options (in shares) | 15,782 |  |  | 44,498 |  |  |
Exercise of stock options | $ 87 |  |  | $ 267 |  |  |
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration (in shares) | (3,582) |  |  | (12,811) |  |  |
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration |  |  |  |  |  |  |
Stock-based compensation (note 14) |  |  |  |  |  |  |
Other comprehensive income |  |  |  |  |  |  |
Balances (in shares) | 10,615,566 |  |  | 10,615,566 |  |  |
Balances | $ 15,635 |  |  | $ 15,635 |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  |  |  |  |
Balances |  |  |  | 15,368 |  |  |
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  |  |  |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |
Balances | 2,931 |  |  | 2,167 |  |  |
Exercise of stock options | (64) |  |  | (205) |  |  |
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration | (116) |  |  | (404) |  |  |
Stock-based compensation (note 14) | 711 |  |  | 1,904 |  |  |
Other comprehensive income |  |  |  |  |  |  |
Balances | 3,462 |  |  | 3,462 |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  |  |  |  |
Balances |  |  |  | 2,167 |  |  |
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  |  |  |  |
Retained Earnings [Member] |  |  |  |  |  |  |
Balances | 51,027 |  |  | 42,676 |  |  |
Exercise of stock options |  |  |  |  |  |  |
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration |  |  |  |  |  |  |
Stock-based compensation (note 14) |  |  |  |  |  |  |
Net income | 5,346 |  |  | 12,698 |  |  |
Other comprehensive income |  |  |  |  |  |  |
Balances | 56,373 |  |  | 56,373 |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  | 1,063 |  |  |
Balances |  |  |  | 43,739 |  |  |
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  | (64) |  |  |
AOCI Attributable to Parent [Member] |  |  |  |  |  |  |
Balances | (243) |  |  |  |  |  |
Exercise of stock options |  |  |  |  |  |  |
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration |  |  |  |  |  |  |
Stock-based compensation (note 14) |  |  |  |  |  |  |
Other comprehensive income | 207 |  |  | (36) |  |  |
Balances | $ (36) |  |  | (36) |  |  |
Impact of Adoption of ASU 2014-09 |  |  |  |  |  |  |
Balances |  |  |  |  |  |  |
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. |  |  |  |  |  |  |
[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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