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Note 13 - Employee Retirement Plans (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Changes in Projected Benefit Obligations [Table Text Block] |
|  | December 31, |
|  | 2022 |  |  | 2021 |
Change in projected benefit obligation: |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | 6,261 |  |  | $ | 6,736 |
Service cost |  |  | 115 |  |  |  | 137 |
Interest cost |  |  | 153 |  |  |  | 137 |
Participant contributions |  |  | 59 |  |  |  | 52 |
Changes in actuarial assumptions |  |  | (972 | ) |  |  | (790 | )
Benefits paid |  |  | (146 | ) |  |  | (11 | )
Projected benefit obligation at end of year |  | $ | 5,470 |  |  | $ | 6,261 |
Amounts recognized in the consolidated balance sheets consisted of: |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  | $ | 240 |  |  | $ | 230 |
Retiree health benefit obligation |  |  | 5,230 |  |  |  | 6,031 |
|  | $ | 5,470 |  |  | $ | 6,261 |
Schedule of Net Benefit Costs [Table Text Block] |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Components of net postretirement health benefit cost: |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 115 |  |  | $ | 137 |  |  | $ | 147 |
Interest cost |  |  | 153 |  |  |  | 137 |  |  |  | 191 |
Amortization of net gain |  |  | (400 | ) |  |  | (312 | ) |  |  | (310 | )
Net postretirement healthcare benefit cost |  | $ | (132 | ) |  | $ | (38 | ) |  | $ | 28 |
Defined Benefit Plan, Assumptions [Table Text Block] |
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Discount rate |  |  | 2.5 | % |  |  | 2.1 | % |  |  | 3.0 | %
Immediate healthcare cost trend rate |  |  | * |  |  |  | ** |  |  |  | *** |
Ultimate healthcare cost trend rate |  |  | 4.5 |  |  |  | 4.5 |  |  |  | 4.5 |
Assumed annual reduction in trend rate |  |  | * |  |  |  | ** |  |  |  | *** |
Participation |  |  | 60 |  |  |  | 60 |  |  |  | 60 |

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- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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