Acquisitions - Estimated amortization expense (Details) - USD ($)		6 Months Ended
	Aug. 02, 2019	Jan. 31, 2020
Noncompete Agreements [Member]
Average Estimated Life		3 years
Preliminary Fair Value
Total	$ 1,112,600
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 | Customer Base [Member]
Total	$ 274,600
Average Estimated Life	10 years
Preliminary Fair Value | Noncompete Agreements [Member]
Total	$ 356,700
Average Estimated Life	3 years