DEBT Notes Payable (Details) - USD ($)	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Debt Instrument
Debt Instrument, Face Amount	$ 18,500,000
Notes Payable	12,333,000
Less current maturities of notes payable	(3,083,000)	$ (3,083,000)
Noncurrent Notes payable	9,161,000	12,215,000
Senior Notes Issued November 2010
Debt Instrument
Notes Payable	12,333,000	15,416,000
Less current maturities of notes payable	(3,083,000)	(3,083,000)
Less unamortized debt issuance costs	(89,000)	(118,000)
Noncurrent Notes payable	9,161,000	$ 12,215,000
Annual Principal Installments	$ 3,083,000
Starting payments	Aug. 01, 2017
Ending payments	Aug. 01, 2020
Annual rate	3.96%
Minimum overdue financial obligation considered as default	$ 5,000,000