Acquisitions - Estimated amortization expense (Details) - USD ($)			12 Months Ended
	Oct. 03, 2019	Aug. 02, 2019	Jul. 31, 2020
Noncompete Agreements [Member]
Average Estimated Life			3 years
Preliminary Fair Value
Total	$ 811,000	$ 1,112,600
Preliminary Fair Value | Customer Base [Member]
Total		$ 274,600
Average Estimated Life		10 years
Preliminary Fair Value | Tradename / Trademarks [Member]
Total		$ 103,000
Average Estimated Life		15 years
Preliminary Fair Value | IP/Technology [Member]
Total		$ 41,500
Average Estimated Life		5 years
Preliminary Fair Value | Business Contracts [Member]
Total		$ 346,800
Average Estimated Life		15 years
Preliminary Fair Value | Noncompete Agreements [Member]
Total	$ 680,000	$ 356,700
Average Estimated Life	3 years	3 years