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Note 18 - Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Balance |  | $ 168,051 | $ 176,470
Other comprehensive income: |  | 6,002 | 1,236
Balance |  | 185,799 | 168,051
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |
Balance |  | (20,032) | (22,635)
Other comprehensive income (loss) before reclassifications |  | 6,890 | 2,603
Amounts reclassified from accumulated other comprehensive income (loss) |  | 0 | 0
Effect of adoption of ASU 2018-02 (Topic 220) |  |  | 0
Other comprehensive income: |  | 6,890 | 2,603
Balance |  | (13,142) | (20,032)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] |  |  |
Balance |  | 12 | 12
Other comprehensive income (loss) before reclassifications |  | 7 | 0
Amounts reclassified from accumulated other comprehensive income (loss) |  | 0 | 0
Effect of adoption of ASU 2018-02 (Topic 220) |  |  | 0
Other comprehensive income: |  | 7 | 0
Balance |  | 19 | 12
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Balance |  | (4,045) | (2,215)
Other comprehensive income (loss) before reclassifications |  | (933) | (1,492)
Amounts reclassified from accumulated other comprehensive income (loss) | [1] | 38 | 125
Effect of adoption of ASU 2018-02 (Topic 220) |  |  | (463)
Other comprehensive income: |  | (895) | (1,830)
Balance |  | (4,940) | (4,045)
AOCI Attributable to Parent [Member] |  |  |
Balance |  | (24,065) | (24,838)
Other comprehensive income (loss) before reclassifications |  | 5,964 | 1,111
Amounts reclassified from accumulated other comprehensive income (loss) |  | 38 | 125
Effect of adoption of ASU 2018-02 (Topic 220) |  |  | (463)
Other comprehensive income: |  | 6,002 | 773
Balance |  | $ (18,063) | $ (24,065)
[1] | This reclassification relates to the amortization of prior service costs and gains/losses associated with the Company's SERP plan. This expense is reflected in other (expense) income, net on the accompanying consolidated statement of operations.

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