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Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Accumulated Other Comprehensive Income [Member] | Accumulated Deficit [Member]
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 192,951 | $ 1,370 | $ 216,006 | $ 291 | $ (24,716)
Balance, shares at Dec. 31, 2017 |  | 136,996,000 |  |  |
Common stock issued (Note 3) | 137,250 | $ 153 | 137,097 |  |
Common stock issued, shares |  | 15,250,000 |  |  |
Restricted stock issued and vesting of restricted stock units, net |  | $ 7 | (7) |  |
Restricted stock issued and vesting of restricted stock units net, shares |  | 825,000 |  |  |
Shares repurchased | (1,006) |  | (1,006) |  |
Shares repurchased, shares |  | (87,000) |  |  |
Exercise of stock options, net | 139 | $ 1 | 138 |  |
Exercise of stock options net, shares |  | 158,000 |  |  |
Stock-based compensation | 6,838 |  | 6,838 |  |
Other comprehensive loss | 170 |  |  | 170 |
Dividends | (9,167) |  |  |  | (9,167)
Net income | 26,148 |  |  |  | 26,148
Balance at Jun. 30, 2018 | 353,323 | $ 1,531 | 359,066 | 461 | (7,735)
Balance, shares at Jun. 30, 2018 |  | 153,142,000 |  |  |
Balance at Mar. 31, 2018 | 201,605 | $ 1,378 | 218,488 | 1,163 | (19,424)
Balance, shares at Mar. 31, 2018 |  | 137,751,000 |  |  |
Common stock issued (Note 3) | 137,250 | $ 153 | 137,097 |  |
Common stock issued, shares |  | 15,250,000 |  |  |
Restricted stock issued and vesting of restricted stock units net, shares |  | 158,000 |  |  |
Shares repurchased | (272) |  | (272) |  |
Shares repurchased, shares |  | (27,000) |  |  |
Exercise of stock options, net | 85 |  | 85 |  |
Exercise of stock options net, shares |  | 10,000 |  |  |
Stock-based compensation | 3,529 |  | 3,529 |  |
Reclassification of stock issuance costs to temporary equity | 139 |  | 139 |  |
Other comprehensive loss | (702) |  |  | (702) |
Dividends | (5,035) |  |  |  | (5,035)
Net income | 16,724 |  |  |  | 16,724
Balance at Jun. 30, 2018 | 353,323 | $ 1,531 | 359,066 | 461 | (7,735)
Balance, shares at Jun. 30, 2018 |  | 153,142,000 |  |  |
Balance at Dec. 31, 2018 | $ 358,335 | $ 1,532 | 363,655 | 467 | (7,319)
Balance, shares at Dec. 31, 2018 | 153,202,000 | 153,202,000 |  |  |
Restricted stock issued and vesting of restricted stock units, net |  | $ 21 | (21) |  |
Restricted stock issued and vesting of restricted stock units net, shares |  | 2,211,000 |  |  |
Shares repurchased | $ (2,107) | $ (2) | (2,105) |  |
Shares repurchased, shares |  | (325,000) |  |  |
Exercise of stock options, net | 14 |  | 14 |  |
Exercise of stock options net, shares |  | 20,000 |  |  |
Stock-based compensation | 6,207 |  | 6,207 |  |
Other comprehensive loss | 258 |  |  | 258 |
Dividends | (10,191) |  |  |  | (10,191)
Net income | 11,303 |  |  |  | 11,303
Balance at Jun. 30, 2019 | $ 363,819 | $ 1,551 | 367,750 | 725 | (6,207)
Balance, shares at Jun. 30, 2019 | 155,108,000 | 155,108,000 |  |  |
Balance at Mar. 31, 2019 | $ 363,434 | $ 1,551 | 364,717 | 758 | (3,592)
Balance, shares at Mar. 31, 2019 |  | 155,056,000 |  |  |
Restricted stock issued and vesting of restricted stock units net, shares |  | 66,000 |  |  |
Shares repurchased | (102) |  | (102) |  |
Shares repurchased, shares |  | (14,000) |  |  |
Stock-based compensation | 3,135 |  | 3,135 |  |
Other comprehensive loss | (33) |  |  | (33) |
Dividends | (5,094) |  |  |  | (5,094)
Net income | 2,479 |  |  |  | 2,479
Balance at Jun. 30, 2019 | $ 363,819 | $ 1,551 | $ 367,750 | $ 725 | $ (6,207)
Balance, shares at Jun. 30, 2019 | 155,108,000 | 155,108,000 |  |  |

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