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Condensed Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands | Common Stock | Treasury Stock | Additional Paid-In Capital | Retained Earnings (Deficit) | Total
--- | --- | --- | --- | --- | ---
Balance, Treasury Shares |  | (7,581,000) |  |  |
Balance at Dec. 31, 2017 | $ 6,644 | $ (37,953) | $ 71,251 | $ (29,653) | $ 10,289
Balance, Shares at Dec. 31, 2017 | 66,444,000 |  |  |  |
Stock-based compensation expense |  |  | 149 |  | 149
Net income (loss) |  |  |  | 8,659 | 8,659
Balance at Mar. 31, 2018 | $ 6,644 | (37,953) | 71,400 | (20,994) | 19,097
Balance, Shares at Mar. 31, 2018 | 66,444,000 |  |  |  |
Balance at Dec. 31, 2017 | $ 6,644 | (37,953) | 71,251 | (29,653) | 10,289
Balance, Shares at Dec. 31, 2017 | 66,444,000 |  |  |  |
Net income (loss) |  |  |  |  | 87,808
Balance at Sep. 30, 2018 | $ 6,709 | $ (37,798) | 72,229 | 58,155 | 99,295
Balance, Shares at Sep. 30, 2018 | 67,093,000 | 7,554,000 |  |  |
Balance, Treasury Shares |  | (7,581,000) |  |  |
Balance at Mar. 31, 2018 | $ 6,644 | $ (37,953) | 71,400 | (20,994) | 19,097
Balance, Shares at Mar. 31, 2018 | 66,444,000 |  |  |  |
Shares issued - stock-based compensation | $ 52 | $ 177 | 216 |  | 445
Shares issued - stock-based compensation, Shares | 522,000 | 36,000 |  |  |
Stock-based compensation expense |  |  | 397 |  | 397
Net income (loss) |  |  |  | 544 | 544
Balance at Jun. 30, 2018 | $ 6,696 | $ (37,776) | 72,013 | (20,450) | 20,483
Balance, Shares at Jun. 30, 2018 | 66,966,000 | (7,545,000) |  |  |
Shares issued - stock-based compensation | $ 13 | $ (22) | 80 |  | 71
Shares issued - stock-based compensation, Shares | 127,000 | (9,000) |  |  |
Stock-based compensation expense |  |  | 136 |  | 136
Net income (loss) |  |  |  | 78,605 | 78,605
Balance at Sep. 30, 2018 | $ 6,709 | $ (37,798) | 72,229 | 58,155 | $ 99,295
Balance, Shares at Sep. 30, 2018 | 67,093,000 | 7,554,000 |  |  |
Balance, Treasury Shares |  | (7,572,000) |  |  | (7,572,251)
Balance at Dec. 31, 2018 | $ 6,717 | $ (37,827) | 72,358 | 68,579 | $ 109,827
Balance, Shares at Dec. 31, 2018 | 67,168,000 |  |  |  |
Shares issued - stock-based compensation | $ 16 |  | 31 |  | 47
Shares issued - stock-based compensation, Shares | 160,000 |  |  |  |
Stock-based compensation expense |  |  | 28 |  | 28
Treasury stock acquired |  | $ (105) |  |  | (105)
Treasury stock acquired, Shares |  | (45,000) |  |  |
Net income (loss) |  |  |  | 6,501 | 6,501
Balance at Mar. 31, 2019 | $ 6,733 | $ (37,932) | 72,417 | 75,080 | 116,298
Balance, Shares at Mar. 31, 2019 | 67,328,000 |  |  |  |
Balance at Dec. 31, 2018 | $ 6,717 | (37,827) | 72,358 | 68,579 | 109,827
Balance, Shares at Dec. 31, 2018 | 67,168,000 |  |  |  |
Net income (loss) |  |  |  |  | 1,549
Balance at Sep. 30, 2019 | $ 6,748 | $ (39,943) | 73,263 | 69,819 | 109,887
Balance, Shares at Sep. 30, 2019 | 67,479,000 |  |  |  |
Balance, Treasury Shares |  | (7,617,000) |  |  |
Balance at Mar. 31, 2019 | $ 6,733 | $ (37,932) | 72,417 | 75,080 | 116,298
Balance, Shares at Mar. 31, 2019 | 67,328,000 |  |  |  |
Shares issued - stock-based compensation | $ 12 |  | 48 |  | 60
Shares issued - stock-based compensation, Shares | 124,000 |  |  |  |
Stock-based compensation expense |  |  | 594 |  | 594
Treasury stock acquired |  | $ 62 |  | (309) | (247)
Treasury stock acquired, Shares |  | (79,000) |  |  |
Net income (loss) |  |  |  | (1,033) | (1,033)
Balance at Jun. 30, 2019 | $ 6,745 | $ (37,870) | 73,059 | 73,738 | 115,672
Balance, Shares at Jun. 30, 2019 | 67,452,000 | (7,696,000) |  |  |
Shares issued - stock-based compensation | $ 3 |  | 23 |  | 26
Shares issued - stock-based compensation, Shares | 27,000 |  |  |  |
Stock-based compensation expense |  |  | 181 |  | 181
Treasury stock acquired |  | $ (2,073) |  |  | (2,073)
Treasury stock acquired, Shares |  | (1,190,000) |  |  |
Net income (loss) |  |  |  | (3,919) | (3,919)
Balance at Sep. 30, 2019 | $ 6,748 | $ (39,943) | $ 73,263 | $ 69,819 | $ 109,887
Balance, Shares at Sep. 30, 2019 | 67,479,000 |  |  |  |
Balance, Treasury Shares |  | (8,886,000) |  |  | (8,885,829)

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