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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, 2019 | Dec. 31, 2018
Balance |  | $ 176,470 | $ 157,960
Other comprehensive income (loss): |  | 1,236 | (5,213)
Balance |  | 168,051 | 176,470
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |
Balance |  | (22,635) | (16,537)
Other comprehensive income (loss) before reclassifications |  | 2,603 | (6,098)
Amounts reclassified from accumulated other comprehensive income (loss) |  |  |
Other comprehensive income (loss): |  | 2,603 | (6,098)
Effect of adoption of ASU 2018-02 (Topic 220) |  |  |
Balance |  | (20,032) | (22,635)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] |  |  |
Balance |  | 12 | 145
Other comprehensive income (loss) before reclassifications |  |  | 37
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | (170)
Other comprehensive income (loss): |  |  | (133)
Effect of adoption of ASU 2018-02 (Topic 220) |  |  |
Balance |  | 12 | 12
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Balance |  | (2,215) | (3,233)
Other comprehensive income (loss) before reclassifications |  | (1,492) | 679
Amounts reclassified from accumulated other comprehensive income (loss) | [1] | 125 | 339
Other comprehensive income (loss): |  | (1,830) | 1,018
Effect of adoption of ASU 2018-02 (Topic 220) |  | (463) |
Balance |  | (4,045) | (2,215)
AOCI Attributable to Parent [Member] |  |  |
Balance |  | (24,838) | (19,625)
Other comprehensive income (loss) before reclassifications |  | 1,111 | (5,382)
Amounts reclassified from accumulated other comprehensive income (loss) |  | 125 | 169
Other comprehensive income (loss): |  | 773 | (5,213)
Effect of adoption of ASU 2018-02 (Topic 220) |  | (463) |
Balance |  | $ (24,065) | $ (24,838)
[1] | This reclassification relates to the amortization of prior service costs and gains/losses associated with the Company's SERP plan. This expense is allocated between cost of sales and selling, general and administrative expense based upon the employment classification of the plan participants.

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