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Note 18 - Commitments and Contingent Liabilities (Details Textual) - USD ($)				12 Months Ended
	Dec. 18, 2017	Nov. 18, 2017	Jun. 01, 2017	Oct. 31, 2017
Grandview at Riverwalk Port Imperial Condominium Association Construction Defect Lawsuit [Member]
Loss Contingency, Damages Sought, Value				$ 41,300,000
Loss Contingency, Damages Awarded, Value			$ 9,000,000
Grandview at Riverwalk Port Imperial Condominium Association Construction Defect Lawsuit [Member] | Minimum [Member]
Loss Contingency, Estimate of Possible Loss				0
Grandview at Riverwalk Port Imperial Condominium Association Construction Defect Lawsuit [Member] | Maximum [Member]
Loss Contingency, Estimate of Possible Loss				10,800,000
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			$ 3,000,000
Grandview at Riverwalk Port Imperial Condominium Association Construction Defect Lawsuit [Member] | Attorney Fees and Costs [Member] | Subsequent Event [Member]
Litigation Settlement, Amount Awarded to Other Party		$ 1,800,000
Litigation Settlement, Amount Sought from Other Party		$ 4,800,000
Construction and Design Defects Lawsuit from Second Condominium Association [Member] | Minimum [Member]
Loss Contingency, Damages Sought, Value				69,000,000
Construction and Design Defects Lawsuit from Second Condominium Association [Member] | Maximum [Member]
Loss Contingency, Damages Sought, Value				$ 79,000,000
Class Action Lawsuit Filed by Plaintiff Joseph Hong [Member] | Subsequent Event [Member]
Litigation Settlement, Amount Awarded to Other Party	$ 275,000

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