Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Weighted Average Amortization Period	12 years	4 years 9 months 18 days
Gross Carrying amount	$ 7,701	$ 3,552
Accumulated Amortization	(3,505)	(3,056)
Net Balance	$ 4,196	$ 496
Noncompete Agreements [Member]
Weighted Average Amortization Period	5 years
Gross Carrying amount	$ 595
Accumulated Amortization	(104)
Net Balance	$ 491
Customer Relationships [Member]
Weighted Average Amortization Period	11 years 10 months 25 days	4 years 9 months 18 days
Gross Carrying amount	$ 6,136	$ 3,154
Accumulated Amortization	(3,081)	(2,883)
Net Balance	$ 3,055	$ 271
Trade Names [Member]
Weighted Average Amortization Period	17 years	4 years 8 months 12 days
Gross Carrying amount	$ 970	$ 398
Accumulated Amortization	(320)	(173)
Net Balance	$ 650	$ 225