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Note 18 - Commitments and Contingent Liabilities (Details Textual) - USD ($) $ in Millions |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
May 02, 2018 | Jan. 12, 2018 | Dec. 15, 2017 | Jun. 01, 2017 | Oct. 31, 2018 | Feb. 16, 2018
EPA Case Involving a Housing Redevelopment Project in Newark, New Jersey [Member] |  |  |  |  |  |
Loss Contingency, Percentage of Plaintiff's Costs for Which Reimbursement is Demanded | 100.00% |  |  |  |  |
Loss Contingency, Damages Sought, Value | $ 2.7 |  |  |  |  |
Grandview at Riverwalk Port Imperial Condominium Association Construction Defect Lawsuit [Member] |  |  |  |  |  |
Loss Contingency, Damages Sought, Value |  |  |  |  | $ 41.3 |
Loss Contingency, Damages Awarded, Value |  |  |  | $ 9.0 |  |
Litigation Settlement, Amount Awarded to Other Party |  | $ 10.4 |  |  |  |
Loss Contingency, Supersedeas Bond |  |  |  |  |  | $ 11.1
Grandview at Riverwalk Port Imperial Condominium Association Construction Defect Lawsuit [Member] | Breach of Warranty and New Jersey Fraud Claims Prior to Statutory Trebling [Member] |  |  |  |  |  |
Loss Contingency, Damages Awarded, Value |  |  |  | $ 3.0 |  |
Grandview at Riverwalk Port Imperial Condominium Association Construction Defect Lawsuit [Member] | Attorney Fees and Costs [Member] |  |  |  |  |  |
Litigation Settlement, Amount Awarded to Other Party |  |  | $ 1.4 |  |  |
Great Notch Condominium Claims[Member] |  |  |  |  |  |
Loss Contingency, Damages Sought, Value |  |  |  |  | $ 119.5 |

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