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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (UNAUDITED) - USD ($) $ in Thousands | Total | Common Stock | Treasury Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income
--- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2017 |  | 40,393,033 | 81,052 |  |  |
Beginning balance at Dec. 31, 2017 | $ 190,022 | $ 40 | $ (666) | $ 159,059 | $ 31,589 | $ 0
Foreign currency translation adjustments |  |  |  |  |  |
Foreign currency translation adjustment | 76 |  |  |  |  | 76
Vesting of restricted stock (in shares) |  | 156,113 |  |  |  |
Stock-based compensation | 1,260 |  |  | 1,260 |  |
Employee stock purchase plan compensation | 38 |  |  | 38 |  |
Employee stock purchase plan issuance (in shares) |  | 9,639 |  |  |  |
Employee stock purchase plan issuance | 71 |  |  | 71 |  |
Restricted stock buy back (in shares) |  | (29,603) | 29,603 |  |  |
Restricted stock buy back | (173) |  | $ (173) |  |  |
Net income | 10,996 |  |  |  | 10,996 |
Ending balance (in shares) at Jun. 30, 2018 |  | 40,529,182 | 110,655 |  |  |
Ending balance at Jun. 30, 2018 | 202,290 | $ 40 | $ (839) | 160,428 | 42,585 | 76
Foreign currency translation adjustments |  |  |  |  |  |
Foreign currency translation adjustment | 76 |  |  |  |  |
Net income | 10,021 |  |  |  |  |
Ending balance (in shares) at Jun. 30, 2018 |  | 40,529,182 | 110,655 |  |  |
Ending balance at Jun. 30, 2018 | $ 202,290 | $ 40 | $ (839) | $ 160,428 | $ 42,585 | $ 76

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