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Note 11 - Employees' Benefit Plans (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 3.00% | 6.50%
Defined Contribution Plan, Cost | $ 439 | $ 948
Deferred Compensation Liability, Current and Noncurrent, Total | 242 | 235
Deferred Compensation Arrangement with Individual, Compensation Expense | 3 | 8
Deferred Costs, Total | 74 | 68
Deferred Fee Liability | $ 1,400 | $ 1,400
Two Years Of Service [Member] | Trust for Benefit of Employees [Member] |  |
Defined Benefit Plan, Funded Percentage | 40.00% |
Three Years Of Service [Member] | Trust for Benefit of Employees [Member] |  |
Defined Benefit Plan, Funded Percentage | 60.00% |
Four Years Of Service [Member] | Trust for Benefit of Employees [Member] |  |
Defined Benefit Plan, Funded Percentage | 80.00% |
Five Years Of Service [Member] | Trust for Benefit of Employees [Member] |  |
Defined Benefit Plan, Funded Percentage | 100.00% |
Minimum [Member] |  |
Defined Benefit Plan Employees Pre-tax Contributions | 1.00% |
Maximum [Member] |  |
Defined Benefit Plan Employees Pre-tax Contributions | 50.00% |

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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred fees payable. + References No definition available. + Details
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- Definition Maximum amount, that the employee may contribute to a defined contribution plan before tax payments. + References No definition available. + Details
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- Definition The compensation expense recognized during the period pertaining to the deferred compensation arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References No definition available. + Details
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- Definition Percentage of plan assets to benefit obligation of defined benefit plan. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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