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Note 16 - Commitments and Contingencies (Details Textual) - USD ($) |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Sep. 01, 2020 | Jul. 31, 2020 | Sep. 01, 2019
Self Insurance Auto Liability Claims Threshold Amount |  |  |  |  | $ 2,000,000.0 |  | $ 1,000,000.0
Trucks under Operating Lease [Member] |  |  |  |  |  |  |
Operating Lease, Expense |  | $ 0 | $ 0 | $ 47,000 |  |  |
The Violations under the Fair Labor Standards Act and the Arkansas Minimum Wage [Member] |  |  |  |  |  |  |
Loss Contingency Accrual, Ending Balance |  |  |  |  |  | $ 16,500,000 |
Litigation Settlement, Amount Awarded to Other Party | $ 421,000 |  |  |  |  |  |

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- Definition Represents self insurance auto liability claims threshold amount. + References No definition available. + Details
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- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 + Details
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- Details
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- Details
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