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Note 13 - Per Share Calculations - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Net (loss) earnings attributable to Hovnanian	$ (1,807)	$ (7,601)	$ (15,257)	$ (17,452)	$ 46,178	$ (1,026)	$ (9,823)	$ (30,809)	$ (42,117)	$ 4,520	$ (332,193)
Less: undistributed earnings allocated to nonvested shares										(159)
Numerator for basic earnings per share									(42,117)	4,361	(332,193)
Plus: undistributed earnings allocated to nonvested shares										159
Less: undistributed earnings reallocated to nonvested shares										(159)
Numerator for diluted earnings per share									$ (42,117)	$ 4,361	$ (332,193)
Denominator for basic earnings per share (in shares)					5,957	5,947	5,937	5,921	5,968	5,941	5,908
Share-based payments (in shares)										131
Denominator for diluted earnings per share – weighted-average shares outstanding (in shares)					6,077	5,947	5,937	5,921	5,968	6,072	5,908
Net (loss) income per common share (in dollars per share)					$ 7.75	$ (0.18)	$ (1.65)	$ (5.20)	$ (7.06)	$ 0.73	$ (56.23)
Diluted earnings (loss) per share (in dollars per share)					$ 7.34	$ (0.18)	$ (1.65)	$ (5.20)	$ (7.06)	$ 0.72	$ (56.23)

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