Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended											12 Months Ended
	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Oct. 31, 2013	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Current:
Federal												$ 39		$ 21
State and local												(35)	(34)	6
Total												4	(34)	27
Deferred:
Federal													(2,211)	1,925
State and local													(469)	401
Total													2,809	(2,809)
BENEFIT FROM (PROVISION FOR) INCOME TAXES	$ (15)	$ 25		$ (6)	$ (2,660)	$ 801	$ (100)	$ (755)	$ 2,393	$ (40)		$ (4)	$ 2,714	$ (2,353)