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Note 18 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Stockholders Equity [Table Text Block] |
|  | December 31, |
|  | 2020 |  |  | 2019 |
Foreign currency translation adjustments, net of tax |  | $ | (10,847 | ) |  | $ | (10,623 | )
Employee benefit related adjustments – U.S, net of tax. |  |  | (13,867 | ) |  |  | (13,544 | )
Employee benefit related adjustments – Mexico, net of tax |  |  | 16 |  |  |  | 116 |
Accumulated other comprehensive loss |  | $ | (24,698 | ) |  | $ | (24,051 | )
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Accumulated |
|  | Foreign |  |  | Defined |  |  | Other |
|  | Currency |  |  | Benefit |  |  | Comprehensive |
|  | Translation |  |  | Plans |  |  | Loss |
Balance at January 1, 2019 |  | $ | (10,967 | ) |  | $ | (13,875 | ) |  | $ | (24,842 | )
Currency translation adjustments, net of tax |  |  | 344 |  |  |  | 0 |  |  |  | 344 |
Net actuarial loss for the year, net of tax |  |  | 0 |  |  |  | (64 | ) |  |  | (64 | )
Amortization for the year, net of tax |  |  | 0 |  |  |  | 511 |  |  |  | 511 |
Balance at December 31, 2019 |  | $ | (10,623 | ) |  | $ | (13,428 | ) |  | $ | (24,051 | )
Currency translation adjustments, net of tax |  |  | (224 | ) |  |  | 0 |  |  |  | (224 | )
Net actuarial loss for the year, net of tax |  |  | 0 |  |  |  | (1,054 | ) |  |  | (1,054 | )
Amortization for the year, net of tax |  |  | 0 |  |  |  | 631 |  |  |  | 631 |
Balance at December 31, 2020 |  | $ | (10,847 | ) |  | $ | (13,851 | ) |  | $ | (24,698 | )

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