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Note 11 - Commitments and Contingencies (Details Textual) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2022 | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Product Liability Accrual, Component Amount |  |  | $ 0
Self Insurance Reserve |  | $ 30 | 166
Accrued Health Insurance Liabilities |  | $ 360 | $ 416
Collective Bargaining Agreements, Number of Agreements |  | 2 |
Neville Island Union [Member] |  |  |
Collective Bargaining Agreement, Term (Year) | 4 years |  |
Cicero Union [Member] |  |  |
Collective Bargaining Agreement, Term (Year) | 4 years |  |
Workforce Subject to Collective-Bargaining Arrangements Expiring within One Year [Member] | Unionized Employees Concentration Risk [Member] |  |  |
Concentration Risk, Percentage |  | 19.00% |
Minimum [Member] |  |  |
Product Warranty Term (Year) |  | 1 year | 1 year
Maximum [Member] |  |  |
Product Warranty Term (Year) |  | 5 years | 5 years

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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