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Consolidated Statement of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Divestiture [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings (Loss) [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Accumulated Other Comprehensive Income (Loss) [Member] Divestiture [Member] | Treasury Stock [Member] | CECO | CECO Divestiture [Member] | Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2015 | $ 245,021 |  | $ 340 | $ 243,274 | $ 5,472 | $ (9,577) |  | $ (356) | $ 239,153 |  | $ 5,868
Beginning Balance, Shares at Dec. 31, 2015 |  |  | 34,056 |  |  |  |  | (138) |  |  |
Net loss | (38,254) |  |  |  | (38,218) |  |  |  | (38,218) |  | (36)
Common stock dividends | (8,995) |  |  |  | (8,995) |  |  |  | (8,995) |  |
Exercise of stock options and dividend reinvestment issuances | $ 1,515 |  | $ 2 | 1,513 |  |  |  |  | 1,515 |  |
Exercise of stock options and dividend reinvestment issuances, Shares | 195 |  | 215 |  |  |  |  |  |  |  |
Excess tax benefit from stock options exercised | $ 137 |  |  | 137 |  |  |  |  | 137 |  |
Restricted stock units issued | (9) |  |  | (9) |  |  |  |  | (9) |  |
Restricted stock units issued, Shares |  |  | 17 |  |  |  |  |  |  |  |
Share based compensation earned | 2,458 |  | $ 1 | 2,457 |  |  |  |  | 2,458 |  |
Share based compensation earned, Shares |  |  | 27 |  |  |  |  |  |  |  |
Issuance of shares for cashless warrant exercise |  |  | $ 1 | (1) |  |  |  |  |  |  |
Issuance of shares for cashless warrant exercise, Shares |  |  | 90 |  |  |  |  |  |  |  |
Stock repurchase and retirement | (1,238) |  | $ (1) | (1,237) |  |  |  |  | (1,238) |  |
Stock repurchase and retirement, Shares |  |  | (105) |  |  |  |  |  |  |  |
Noncontrolling interest acquisition | (7,088) |  |  | (1,256) |  |  |  |  | (1,256) |  | $ (5,832)
Adjustment for minimum pension liability, net of tax | 87 |  |  |  |  | 87 |  |  | 87 |  |
Interest rate swap | 312 |  |  |  |  | 312 |  |  | 312 |  |
Translation income (loss) | (3,864) |  |  |  |  | (3,864) |  |  | (3,864) |  |
Ending Balance at Dec. 31, 2016 | 190,082 |  | $ 343 | 244,878 | (41,741) | (13,042) |  | $ (356) | 190,082 |  |
Ending Balance, Shares at Dec. 31, 2016 |  |  | 34,300 |  |  |  |  | (138) |  |  |
Translation (loss) gain, beginning balance at Dec. 31, 2015 | (4,407) |  |  |  |  |  |  |  |  |  |
Translation (loss) gain, ending balance at Dec. 31, 2016 | (8,271) |  |  |  |  |  |  |  |  |  |
Minimum pension liability adjustment beginning balance at Dec. 31, 2015 | (5,170) |  |  |  |  |  |  |  |  |  |
Minimum pension liability adjustment, ending balance at Dec. 31, 2016 | (5,083) |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss, beginning balance at Dec. 31, 2015 | (9,577) |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss, activity | (3,465) |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss, ending balance at Dec. 31, 2016 | (13,042) |  |  |  |  |  |  |  |  |  |
Interest rate swap adjustment ending balance at Dec. 31, 2016 | 312 |  |  |  |  |  |  |  |  |  |
Net loss | (3,029) |  |  |  | (3,029) |  |  |  | (3,029) |  |
Cumulative effect adjustment | ASU 2016-09 [Member] | 66 |  |  | 177 | (111) |  |  |  | 66 |  |
Common stock dividends | (7,792) |  |  |  | (7,792) |  |  |  | (7,792) |  |
Exercise of stock options and dividend reinvestment issuances | $ 1,295 |  | $ 3 | 1,292 |  |  |  |  | 1,295 |  |
Exercise of stock options and dividend reinvestment issuances, Shares | 292 |  | 291 |  |  |  |  |  |  |  |
Restricted stock units issued | $ (135) |  | $ 1 | (136) |  |  |  |  | (135) |  |
Restricted stock units issued, Shares |  |  | 92 |  |  |  |  |  |  |  |
Share based compensation earned | 1,959 |  |  | 1,959 |  |  |  |  | 1,959 |  |
Share based compensation earned, Shares |  |  | 25 |  |  |  |  |  |  |  |
Adjustment for minimum pension liability, net of tax | (78) |  |  |  |  | (78) |  |  | (78) |  |
Interest rate swap | 180 |  |  |  |  | 180 |  |  | 180 |  |
Translation income (loss) | 4,021 |  |  |  |  | 4,021 |  |  | 4,021 |  |
Ending Balance at Dec. 31, 2017 | 186,569 |  | $ 347 | 248,170 | (52,673) | (8,919) |  | $ (356) | 186,569 |  |
Ending Balance, Shares at Dec. 31, 2017 |  |  | 34,708 |  |  |  |  | (138) |  |  |
Translation (loss) gain, ending balance at Dec. 31, 2017 | (4,250) |  |  |  |  |  |  |  |  |  |
Minimum pension liability adjustment, ending balance at Dec. 31, 2017 | (5,161) |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss, activity | 4,123 |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss, ending balance at Dec. 31, 2017 | (8,919) |  |  |  |  |  |  |  |  |  |
Interest rate swap adjustment ending balance at Dec. 31, 2017 | 492 |  |  |  |  |  |  |  |  |  |
Net loss | (7,121) |  |  |  | (7,121) |  |  |  | (7,121) |  |
Cumulative effect adjustment | ASU 2018-02 [Member] | (30) |  |  |  | 1,037 | (1,067) |  |  | (30) |  |
Cumulative effect adjustment | ASU 2014-09 [Member] | (622) |  |  |  | (622) |  |  |  | (622) |  |
Cumulative translation adjustment for divestiture |  | $ 375 |  |  |  |  | $ 375 |  |  | $ 375 |
Translation (loss) gain, cumulative translation adjustment |  | 375 |  |  |  |  |  |  |  |  |
Minimum pension liability adjustment, cumulative translation adjustment | ASU 2018-02 [Member] | (1,062) |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss, cumulative translation adjustment |  | $ 375 |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss, cumulative translation adjustment | ASU 2018-02 [Member] | (1,067) |  |  |  |  |  |  |  |  |  |
Adjustment for interest rate swap, net of tax | ASU 2018-02 [Member] | (5) |  |  |  |  |  |  |  |  |  |
Exercise of stock options and dividend reinvestment issuances | $ 89 |  |  | 89 |  |  |  |  | 89 |  |
Exercise of stock options and dividend reinvestment issuances, Shares | 16 |  | 16 |  |  |  |  |  |  |  |
Restricted stock units issued | $ (253) |  | $ 2 | (207) | 48 |  |  |  | (253) |  |
Restricted stock units issued, Shares |  |  | 192 |  |  |  |  |  |  |  |
Share based compensation earned | 3,357 |  |  | 3,357 |  |  |  |  | 3,357 |  |
Share based compensation earned, Shares |  |  | 38 |  |  |  |  |  |  |  |
Adjustment for minimum pension liability, net of tax | (22) |  |  |  |  | (22) |  |  | (22) |  |
Interest rate swap | 76 |  |  |  |  | 76 |  |  | 76 |  |
Translation income (loss) | (3,858) |  |  |  |  | (3,858) |  |  | (3,858) |  |
Ending Balance at Dec. 31, 2018 | 178,560 |  | $ 349 | $ 251,409 | $ (59,427) | $ (13,415) |  | $ (356) | $ 178,560 |  |
Ending Balance, Shares at Dec. 31, 2018 |  |  | 34,954 |  |  |  |  | (138) |  |  |
Translation (loss) gain, ending balance at Dec. 31, 2018 | (7,733) |  |  |  |  |  |  |  |  |  |
Minimum pension liability adjustment, ending balance at Dec. 31, 2018 | (6,245) |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss, activity | (3,804) |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss, ending balance at Dec. 31, 2018 | (13,415) |  |  |  |  |  |  |  |  |  |
Interest rate swap adjustment ending balance at Dec. 31, 2018 | $ 563 |  |  |  |  |  |  |  |  |  |

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