Note 7 - Commitments and Contingent Liabilities (Details Textual) - USD ($)		9 Months Ended
	Jun. 01, 2017	Jul. 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	9,000,000
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
Construction and Design Defects Lawsuit from Second Condominium Association [Member]
Loss Contingency, Damages Sought, Value		$ 70,000,000