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Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) | Total | Foreign currency hedging derivatives [Member] | Interest Rate Swaps [Member] | Common Stock Outstanding [Member] | Paid-In Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Accumulated Other Comprehensive Income (Loss) [Member] Foreign currency hedging derivatives [Member] | Accumulated Other Comprehensive Income (Loss) [Member] Interest Rate Swaps [Member] | Treasury Stock [Member] | Retained Earnings [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance, Shares at Dec. 31, 2018 | 7,776,164 |  |  |  |  |  |  |  |  |
Common Stock Outstanding, shares [Roll forward] |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock, Shares | (7,744) |  |  |  |  |  |  |  |  |
Restricted stock vested, shares | 86,316 |  |  |  |  |  |  |  |  |
Ending Balance, Shares at Sep. 30, 2019 | 7,854,736 |  |  | 7,854,736 |  |  |  |  |  |
Beginning Balance at Dec. 31, 2018 | $ 98,929,000 |  |  | $ 78,000 | $ 33,208,000 | $ 2,117,000 |  |  | $ (28,403,000) | $ 91,929,000
Common Stock Outstanding, shares [Roll forward] |  |  |  |  |  |  |  |  |  |
Net income (loss) | (9,761,000) |  |  |  |  |  |  |  |  | (9,761,000)
Change in post retirement benefits, net of tax benefit | (225,000) |  |  |  |  | (225,000) |  |  |  |
Change in unrealized foreign currency hedge and interest rate swaps, net of tax or benefit |  | $ 396,000 | $ (625,000) |  |  |  | $ 396,000 | $ (625,000) |  |
Purchase of treasury stock | (60,000) |  |  |  |  |  |  |  | (60,000) |
Restricted stock vested | 1,000 |  |  |  |  |  |  |  |  |
Share-based compensation | 1,264,000 |  |  |  | 1,264,000 |  |  |  |  |
Ending Balance at Sep. 30, 2019 | $ 89,919,000 |  |  | $ 79,000 | 34,472,000 | 1,663,000 |  |  | (28,463,000) | 82,168,000
Beginning Balance, Shares at Jun. 30, 2019 | 7,854,736 |  |  | 7,854,736 |  |  |  |  |  |
Ending Balance, Shares at Sep. 30, 2019 | 7,854,736 |  |  | 7,854,736 |  |  |  |  |  |
Beginning Balance at Jun. 30, 2019 | $ 95,984,000 |  |  | $ 79,000 | 34,074,000 | 2,001,000 |  |  | (28,463,000) | 88,293,000
Common Stock Outstanding, shares [Roll forward] |  |  |  |  |  |  |  |  |  |
Net income (loss) | (6,125,000) |  |  |  |  |  |  |  |  | (6,125,000)
Change in post retirement benefits, net of tax benefit | (75,000) |  |  |  |  | (75,000) |  |  |  |
Change in unrealized foreign currency hedge and interest rate swaps, net of tax or benefit |  | $ (196,000) | $ (67,000) |  |  |  | $ (196,000) | $ (67,000) |  |
Share-based compensation | 398,000 |  |  |  | 398,000 |  |  |  |  |
Ending Balance at Sep. 30, 2019 | $ 89,919,000 |  |  | $ 79,000 | $ 34,472,000 | $ 1,663,000 |  |  | $ (28,463,000) | $ 82,168,000
Beginning Balance, Shares at Dec. 31, 2019 | 7,877,945 |  |  |  |  |  |  |  |  |
Common Stock Outstanding, shares [Roll forward] |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock, Shares | (4,574) |  |  |  |  |  |  |  |  |
Restricted stock vested, shares | 98,502 |  |  |  |  |  |  |  |  |
Ending Balance, Shares at Sep. 30, 2020 | 7,971,873 |  |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2019 | $ 84,426,000 |  |  |  |  |  |  |  |  |
Common Stock Outstanding, shares [Roll forward] |  |  |  |  |  |  |  |  |  |
Net income (loss) | 9,032,000 |  |  |  |  |  |  |  |  |
Change in post retirement benefits, net of tax benefit | (186,000) |  |  |  |  |  |  |  |  |
Share-based compensation | 1,059,000 |  |  |  |  |  |  |  |  |
Ending Balance at Sep. 30, 2020 | $ 93,529,000 |  |  |  |  |  |  |  |  |
Beginning Balance, Shares at Jun. 30, 2020 | 7,965,289 |  |  |  |  |  |  |  |  |
Common Stock Outstanding, shares [Roll forward] |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock, Shares | (4,574) |  |  |  |  |  |  |  |  |
Restricted stock vested, shares | 11,158 |  |  |  |  |  |  |  |  |
Ending Balance, Shares at Sep. 30, 2020 | 7,971,873 |  |  |  |  |  |  |  |  |
Beginning Balance at Jun. 30, 2020 | $ 89,452,000 |  |  |  |  |  |  |  |  |
Common Stock Outstanding, shares [Roll forward] |  |  |  |  |  |  |  |  |  |
Net income (loss) | 3,343,000 |  |  |  |  |  |  |  |  |
Change in post retirement benefits, net of tax benefit | (61,000) |  |  |  |  |  |  |  |  |
Share-based compensation | 355,000 |  |  |  |  |  |  |  |  |
Ending Balance at Sep. 30, 2020 | $ 93,529,000 |  |  |  |  |  |  |  |  |

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