Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2021	May 01, 2020
Leases
Weighted-average remaining lease term	9 years 10 months 24 days
Weighed average discount rate	3.90%
Cash paid for operating leases	$ 364,200	$ 337,100
Operating lease cost	$ 361,900	$ 336,500